Monthly Archives: May 2017

Blown Film Extrusion Introduction

Blown Film Extrusion Introduction
Blown film extrusion is a technology that is the most common method to make plastic films, especially for the packaging industry. The process involves extruding a tube of molten polymer through a die and inflating to several times its initial diameter to form a thin film bubble. This bubble is then collapsed and used as a lay-flat film or can be made into bags. Usually polyethylene is used with this process, and other materials can be used as blends with these polymers. A diagram of a polyethylene chain is shown in Figure 1 to the right.
Background Theory on Polymers

In the cooling step of blown film extrusion, the amorphous, transparent melt crystallizes to form a translucent, hazy, or opaque film. The point where opacity begins in the bubble is known as the frost line. 
Fig 1: Model of polytheylene chain frompolyethylene Wikipedia article.The frost line height is controlled by several parameters: the air flow, film speed, and temperature difference between the film and the surroundings. Properties of the film, such as tensile strength, flexural strength, toughness, and optical properties, drastically change depending on the orientation of the molecules. As the transverse or hoop direction properties increase, the machine or longitudinal direction properties decrease. For instance, if all the molecules were aligned in the machine direction, it would be easy to tear the film in that direction, and very difficult in the transverse direction.

The Film Blowing machine Process

Fig 2: Schematic of set-up from User:J.Chiang.

Typically, blown film extrusion is carried out vertically upwards, however horizontal and downward extrusion processes are now becoming more common. Figure 2 shows a schematic of the set-up for blown film extrusion. This procedure consists of four main steps: The polymer material starts in a pellet form, which are successively compacted and melted to form a continuous, viscous liquid. This molten plastic is then forced, or extruded, through an annular die. Air is injected through a hole in the center of the die, and the pressure causes the extruded melt to expand into a bubble. The air entering the bubble replaces air leaving it, so that even and constant pressure is maintained to ensure uniform thickness of the film. The bubble is pulled continually upwards from the die and a cooling ring blows air onto the film. The film can also be cooled from the inside using internal bubble cooling. This reduces the temperature inside the bubble, while maintaining the bubble diameter. After solidification at the frost line, the film moves into a set of nip rollers which collapse the bubble and flatten it into two flat film layers. The puller rolls pull the film onto windup rollers. The film passes through idler rolls during this process to ensure that there is uniform tension in the film. Between the nip rollers and the windup rollers, the film may pass through a treatment centre, depending on the application. During this stage, the film may be slit to form one or two films, or surface treated. Advantages Blown film generally has a better balance of mechanical properties than cast or extruded films because it is drawn in both the transverse and machine directions. Mechanical properties of the thin film include tensile and flexural strength, and toughness. The nearly uniform properties in both directions allow for maximum toughness in the film.
Blown film extrusion can be used to make one large film, two smaller ones, or tubes that can be made into bags. Also, one die can make many different widths and sizes without significant trimming. This high level of flexibility in the process leads to less scrap material and higher productivity. Blown films also require lower melting temperatures than cast extrusion. Measured at the die opening, the temperature of cast film is about 220 C, where as the temperature of blown film is about 135 C. Furthermore, the cost of the equipment is approximately 50% of a cast line.

Blown Film Extrusion Disadvantages Blown film has a less effective cooling process than flat film. Flat film cooling is done by means of chill rolls or water, which have significantly higher specific heat capacities than the air that is used in the blown film cooling process. The higher specific heat capacity allows the substance to absorb more heat with less change in the substance temperature. Compared to cast film, blown film has a more complicated and less accurate method to control film thickness; cast film has a thickness variation of 1 to 2% versus the 3 to 4% for blown film. The resins used for casting typically have a lower melt flow index, which is the amount of polymer that can be forced through a standard die in 10 minutes according to a standard procedure. The melt flow index for cast film is about 5.0 g/10 min where as for blown film it is about 1.0 g/10 min. Consequently, the production rates for cast film are higher: cast film lines can reach production rates of up to 300m/min where as blown film lines are usually less than half this value. And finally, cast film has better optical properties, including transparency, haze, and gloss.

Common Problems Air entrapment between film layers and rollers – this may cause film scratching or wrinkling, or processing problems when winding up the film due to reduced friction. Possible solutions to this is using a vacuum to remove entrapped air or by using winding rolls with a diamond shaped groove in the rubber cover to increase surface area and decrease amount of entrapped air in the film. Large output fluctuations from the die – this causes thickness variations, and can be prevented by keeping the extruder clean and by using more consistently shaped pellets in the extruder. Melt fractures – these appear as roughness or wavy lines on the film surface, and can be eliminated by lowering the viscosity of the polymer melt. This can be done by increasing the melting temperature or by adding an internal lubricant to the material composition. Thickness variations in the film – this can be avoided by centering the die in the extrusion line before every run, adjusting the air speed of the cooling system, or by using heated die lips. Die lines on the surface of the film – this defect reduces the aesthetic appeal of the film, reduces optical properties, and weakens mechanical properties such as tear strength. This can usually be avoided by routinely cleaning the inner surfaces of the die and by refinishing scratched or roughened flow surfaces. Gels – these defects are small, hard globules encapsulated in the film or stuck on the film surface and reduce the aesthetic appeal of the film and cause stress concentration points which may result in premature failure. These are caused by overheating to the point of polymer degradation in the die, and can therefore be avoided by cleaning the inner surfaces of the die on a regular basis. Optimization of the Process Coextrusion One way to improve the line efficiency of blown film extrusion is to implement coextrusion. This is the process of extruding two or more materials simultaneously through a single die. The orifices in the die are arranged such that the layers merge together before cooling. This process saves time because it extrudes two or more layers at the same time, and it provides a method with fewer steps to produce multilayer films. The production rate for a coextruded multilayer film of three layers is about 65m/min, and the production rate for a single layer of blown film is about 130m/min. Thus, in order to produce 10 000m of a three layer multilayer film, it would take almost 4 hours using a single layer blown film process, and only 2 and a half hours using the coextrusion process. Furthermore, the film produced from the single layer process would require an extra step to glue the layers together using some sort of adhesive. Coextrusion is the least expensive means of producing layered films and the coextrusion system is capable of quick changeovers to minimize production line down time.

Minimizing the Melt Temperature
The efficiency of blown film extrusion can be improved by minimizing the temperature of the polymer melt. Reduction of the melt temperature causes the melt to require less heating in the extruder. Normal extrusion conditions have a melting temperature at about 190 C despite the fact that the temperature of the melt only needs to be about 135 C. However, it is not always practical to decrease the melting temperature by that much. By decreasing the melt temperature 2 to 20 C, the motor load can be decreased by about 1 to 10%. Furthermore, reduction of the melt temperature causes less need for cooling, so there is a reduced use of the cooling system. Moreover, removing heat from the bubble is usually the rate-limiting factor in this extrusion process, so by having less heat in the polymer to remove, the rate of the process can be increased, thus yielding higher productivity. A way to maintain the melt temperature at a minimum is to choose an extruder that is matched to the specific processing conditions, such as the material of the melt, pressure, and throughput.

Heated Extrusion Die Lips
Typically, solutions to melt fractures involve decreasing the output or increasing the melt temperature to decrease the shear stress in the extruder. Both of these methods are not ideal because they both reduce the efficiency of the blown film line. Heated extrusion die lips can solve this problem. This targeted heating method allows for film extruders to be run at higher production rates with narrower die gaps while eliminating melt fractures. Direct heat is applied to the surface of the polymer melt as it exits the die so that viscosity is reduced. Therefore, melt fractures, which are caused when trying to extrude too much of the polymer at one time, will no longer act as a limiting factor to increasing the production rate. Furthermore, heated die lips use less energy than increasing the melting temperature because only the surface of the melt is heated and not the bulk of the liquid. Another benefit of using heated die lips is that thickness variations can be controlled by adding heat to certain areas along the die circumference to make the film at that position thinner. This would ensure that no excess material is used.
Determine how much energy each of these processes can save per given volume of material. 

Above article from www.appropedia.org

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Piraeus Port – Athens, Greece

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The port of  Athens , Piraeus was the greatest port of the ancient world and remains one of the busiest in the Mediterranean. In a country that derives most of its livelihood from the sea, Piraeus is the true capital, while  Athens  is a sprawling suburb full of bureaucrats. Still, it’s hard to find much charm in the tall buildings and dusty streets, although Zea Marina and Mikrolimano with their yachts, brightly-lit tavernas and bars are a handsome sight.

Themistocles founded the port of Piraeus in the 5th century BC when Phaliron,  Athens ‘ ancient port, could no longer meet the growing needs of the  city . The Miletian geometer Hippodamos laid it out in a straight grid of streets that have hardly changed. The centre of action was always the huge central agora, where the world’s first commercial fairs and trade expositions were held. All religions were tolerated, and women were allowed, for the first time, to work outside the home.

As Piraeus was crucial to  Athens ‘ power, the conquering Spartans destroyed the Long Walls linking  city  and port in 404, at the end of the Peloponnesian War. After the 100-year Macedonian occupation and a period of peace, Sulla decimated the city to prevent any anti-Roman resistance, and for 1,900 years Piraeus dwindled away into an insignificant village with a population as low as 20, even losing its name to become Porto Leone. Since the selection of  Athens  as the capital of independent Greece, Piraeus has regained its former glory as the reigning port of a seagoing nation, but much of it dates from after 1941, when German bombers blew the port sky-high.

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Athens – Greece

Few cities in the world can compare to the historical significance of Athens. This city is not only the site of the first democracy in history; it has also been populated for over seven thousand years! When Ancient Greece started to rise in the fifth century B.C., it was Athens that sprang up as its capital and epicenter for the government. Athens is still the capital of Greece to this day but much has changed in the many thousands of years since it became the precursor to all of western civilization.

Despite its age, Athens still manages to be a very important and culturally relevant city in the 21st Century. It ranks among the top forty richest cities in the world and is also in the top thirty most expensive cities to live in. This owes much to the fact that Athens is and always has had a central role not only in the economic and political sphere of Greece but of the whole of Europe. Back when it was called “Classical Athens” and was considered one of many “city-states”, it was the educational capital of the world. The fathers of philosophy and modern thinking called Athens their home and the city fostered the growth of the mind, a concept relatively untouched by other countries at the time. Athens was the site of Socrates’ famous dialogues while Plato and Aristotle both used Athens as their headquarters for furthering the Socratic Method with the former’s Academy and the latter’s Lyceum still standing to this day within the city limits.

These days, Athens still boasts a remarkable beauty thanks to the combination of the ancient Greco-Roman architecture mixed with the Neo-Classical and Modern styles that stand side by side and, in some cases like Omonoia Square, are mixed together to create strikingly beautiful buildings. Though the city has withstood attacks from Persians, Romans, Germans, and many more in its thousands of years of existence, the beautiful art and architecture of Athens was nearly decimated by a very unlikely foe in the 1970s: Pollution. The vast amount of air pollution around Greece was taking its toll on the statues and sculptures until the Minister of Culture stepped in and completely revamped Athens’ energy policy. Thanks to his efforts visitors today can stroll around the Acropolis and the Parthenon without breathing in smog and the gorgeous caryatids and sculptures now seem poised to withstand yet another millennium.

Tourists still flock to Athens on a large scale each year and it isn’t hard to see why. Whether it is the history buff reveling in the leftovers of the first democracy or the partygoers who worship Athens’ beautiful beaches and nightlife, there is truly something for everybody in this remarkable city. Few ancient towns possess the immediacy of modern day Athens and it is a testament to the city’s unerring dedication to furthering the mind with intellectual pursuits rather than warmongering that this gorgeous area still stands proudly as a shining beacon to the brilliance of Ancient Greece.

Cheap Flights to Athens

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A glorious and magical  city  worshipped by gods and humans alike,  Athens  happens to be one of the most famous vacation destinations in Europe. With the sun shining over the city all year through, the climate is one of the best in that part of the world, making it an ideal place for tourism. There are several cheap flights to  Athens  plying on a regular basis, board one and embark on a vacation of a lifetime. This enchanting birthplace for civilization is laden with breathtaking views. If it’s not the magnificent landscapes that inspire you, the ancient and contemporary architecture will.

The city with distinct aspects is at once appealing and exciting. A walk around the famous historic triangle of Plaka, Thission and Psyri overwhelms you, a stroll in the old neighborhoods reveal the coexistence of different eras, and the mansions of yore, some well-preserved and some worn out by time present a striking contrast to the modern. The Greek capital dates back to mythological times and as a result the place is dotted with stamps of antiquity all through its surface. The city that you see in its entire splendor is a consequence of several influences, including ancient and medieval Greek, Roman, Byzantine and the contemporary era. Do a wise thing, come to the Greek capital equipped with a rather long stay, reason? The historical attractions are one too many. Start your journey with the South Slope of Acropolis, go on to the ancient Agora, visit the temple of Olympeion Zeus, spent a few hours admiring the Hadrian’s Arch and Library, go atop the Hill of Areopagus, the Hill of Philopappou and that of the Nymphs, and see Kerameikos. Attractions like Lysicrates’ Monument, Panathenaic Stadium, Roman Agora, Temple of Hephaestus, and the Tower of the Winds is also not to be missed.

Museums and art galleries showcasing creative arts are omnipresent throughout  Athens  with some giving a great insight into Greek archeology, history, modern art, while others dedicated to ceramics, music, railway etc. One of the unique selling points of  Athens  as a tourist destination is its close proximity to the whitewashed Greek islands. Enjoy one-day getaways, charming villages, ancient historical cities and equally fascinating and picturesque countrysides, each one with a varied color, culture and character. If you happen to be visit  Athens  with family, fret not. The city presents myriad options for all of you to enjoy together. These include parks and gardens, National Zoo, planetariums, educating and entertaining cultural centers, go-karting areas, and amusement parks. Places to stay and crash in are as varied as the attractions of the city itself. You can opt to stay at a luxurious five-star hotel, book yourself a bed and breakfast, stay in a holiday home or an apartment, or check into a cheap hotel accommodation. Culinary delights and gourmet foods can be relished and savored at any of the several world-class restaurants, or try a meal at the local eating joint, which is equally scrumptious and satisfying. For a prefect start to your holidays in Europe, come to  Athens  first.

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Athens Hotel Guide

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 Athens  is a  city  which arguably has one of the richest histories in the world. It was the home and center of the world empire of Greece, and is still the capital of the country today. If you are looking for a lively  city  rich in culture and history, there are few places better to visit than  Athens .

 Athens  is a  city  riddled with mythology. The city is very ancient, and was the center of learning and Greek culture. Many of the concepts and ideas formulated in ancient Greece are what we today call “western civilization.” Today the city is home to nearly three and a half million people.

 Athens  is named after Athena, the goddess of wisdom, and the best time to visit is during the late summer or fall. Winter is also a good time to visit, as there will be few tourists and the weather will be good with the exception of a bit of rain.

 Athens  is a  city  full of parks, gardens, and cafes. While the hustle of the  city  might remind you of New York, you will find that  Athens  has a charm of its own. There are many landmarks for tourists to see, and you don’t have to travel far to see all of them.

The first place you may want to visit is the Acropolis, the ancient part of  Athens  field with beautiful temples. You will be able to fully appreciate ancient Greek architecture after viewing the Acropolis with your own eyes.

The Agora market is another area of  Athens  you will need to visit. In antiquity this was the center of the commercial and political activity in the city. This was once the place where Socrates gave his speeches, and is also the place where St. Paul searched for potential adherents to Christianity.

When it comes to dining, Athenians love to eat out. You will find a lot of fresh produce while touring the city, and there are plenty of places to eat traditional Greek cuisine. You will want to try the country salad and eggplant mixed with mince meat.

 Athens  is no longer the cheap  city  it used to be. Frugal backpackers can expect to spend 40 euros per day by hiking and staying in hostels. Having your own room and eating at hotels will cost you about 80 euros a day, and if you really want to enjoy yourself you can expect to spend up to 120 euros daily. No matter what budget you’re on, traveling to  Athens  is the trip of a lifetime.

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Athens City Breaks Guide

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For more than 3500 years  Athens  has been attracting visitors. Rich in history and home to one of the most famous buildings of the world – the Parthenon, which represents the golden age of  Athens  urban planning, it is impossible to compete with the impressive architecture of the  city . Apart from being just a tourist spot,  Athens  is also home to more than half the population of Greece.  Athens   city  breaks will surely help you know about this extremely beautiful city.

You are sure to fall in love with the jumbled and elegant skyline of neoclassical facades, whitewashed sugar-cube houses, the Plaka quarter – a colorful mixture of flea markets and antique shops, markets that have stalls piled with huge tubs of olive, fresh fish and well stocked tables laid out of the pavement tavernas.

The acropolis is one of the places visited most by tourists. It provides the best of classical architecture that you can find anywhere else in the world. You find the slender ionic columns of the Temple of Athena and the six female caryatids of the Erechtheion included in the satellite buildings. Theater had a great role in ancient Greece. The Roman theater of Herodes Atticus still stages summer shows for theater enthusiasts. After having a cultural feast at the Acropolis, you can visit the Benaki Museum where you can kindle your curiosities, and the National Archaeological Museum will keep you occupied for days. If you are looking to take a break from the hustle of the Athenian life, a peaceful walk along the 40 acres of the National Gardens is the best.

It is believed that modern  Athens  was born in 1834 and restored as the capital of the newly independent Greece. After the second world war, a massive expansion took place that was funded by American money. The Mediterranean climate was responsible for the high temperatures in the city. Pollution and excess traffic were some of the problems that  Athens  began to face. Visitors and philosophers felt that the architectural excellence were overshadowed by the urbanization. However, more than 3 million people visit this city each year and have a quick look at their favorite places.

Apart from the celebrated classical sites, the city also boasts of Byzanthine, the medieval and ninth century monuments and some of the famous museums in the world. You will also appreciate some of the areas that are immersed in surprisingly natural beauty. Though there is heavy traffic, the village like qualities are very evident in their cafes, markets, tavernas, and in the maze streets surrounding Plaka.  Athens  is also known for its fine restaurants and colorful and varied night life. The port at Piraeus and the metropolitan area are economic powerhouse and industrial areas of Greece. The Olympics in 2004 brought in many new developments that included an airport, new sports venues, extension of the metro system, up-gradation of hotels and renovation of many top museums.

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Athens Concert Hall

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Usually people who visit Athens are more impressed with the antiquities and the famous monuments like the Acropolis and the Parthenon and don’t get me wrong I am impressed too… how couldn’t I be, but there are more things to Athens than people think so, theatres, cinemas, shopping malls and the Concert Hall of Athens which is not too far from the center of town and boats state-of-the-art technology and acoustics.

It was designed by a consortium of foreign and Greek consultants to correspond to the stringent demands of contemporary audiences and performers and can be considered one of the finest in the world.

Apart from the main hall Filon tis Mousikis – Friends of Music- which seats an audience of 2.000 it contains a smaller hall seating 500 people, a music library, recording studios, a restaurant and a foyer in which exhibitions of various kinds are held. It also houses an ultramodern conference centre.

The Megaro schedules concerts of all kinds from classical music of all periods to jazz and folk preformed by world class soloists, groups orchestras, operas and ballet companies throughout the year, except in summer.

It started operating in 1991 and it is an important cultural center of the whole Europe. Its superb acoustics have been acclaimed both by the public and by renowned performers of the music and art world.

The Athens Concert Hall has welcomed top class artists, music ensembles, composers, conductors and performers in an artistic trajectory that has left its mark in the country’s culture scene.

It is very easy to reach the Concert Hall of Athens since there is a metro station named after it which is only a few meters away. It is really easy to find it if you have a Metro Map. Buses and taxis are also available in the area.

As far as accommodation is concerned, there are many Concert Hall Hotels, meaning hotels close to “Megaro Mousikis” to choose from. Athens Hotels are among the best of Greece.

I went there many times for several performances and I even got the chance to see a classical concert dedicated to Antonin Dvorak, a famous musician. The Concert Hall of Athens really impressed me so I thought that I should really share this with you. Don’t miss an excellent opportunity to visit a place like this one!

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Collecting Ancient Athenian Coins

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Coins issued by certain cities or empires took the leading role in dictating which coins were readily acceptable for trade in the Mediterranean lands. One such   city  was  Athens , which established the “Attic standard” that was to be adopted later by Alexander the Great. Silver was used to pay civil servants, soldiers and mercenaries, and it is believed that the latter is the reason that many Greek silver coins were struck in the first place. The non-Greek lands of the Near East issued large quantities of silver coins, most notably the Parthians, Sassanians and Baktrians. These coins vary in style and fabric, the thickness and purity of the planchet on which the coin was struck, and are relatively under valued compared to the more widely collected issues of Greece proper.

In Greek mythology, Athena was the goddess of warfare and wisdom. Later known as Minerva by the Romans, she was the goddess of not only wisdom and battle, but of certain crafts and the protector of all cities and states. At birth, according to one myth, she sprang from the forehead of Zeus, the king of the gods, fully grown and dressed in armor. Athena is usually shown wearing a helmet and a magic shield called the aegis. The goddess Athena was not only wise in war but also in the arts of peace. She supposedly invented the plow and taught men how to yoke oxen. Athena’s chief symbol was the owl and in Greek mythology, the owl is firmly linked with Athena who is usually picture with her owl perched on her shoulder. Some say that is why the owl, in modern times, associated with wisdom.

Athenian coins were used in exchange throughout the Greek world, hoards have been found as far away from  Athens  as Babylon, Afghanistan and Iran. The quantity of Athenian coins minted in last half of the fifth century BC, reflect the changed and powerful position of  Athens  in the eastern Mediterranean, from a small  city-state  defending itself on land against the onslaught of Darius at Marathon,  Athens  grew to be the  center  of an empire whose power was dependent on its control of the sea. From being a partner in and administrative head of the Delian League,  Athens  became its leader and its many  city-state  members paid  Athens  tribute.

Huge sums must have been necessary for the commercial activities of  Athens  port  city , Piraeus, construction atop the Acropolis and in the city, financing of the Athenian fleet, and perennial warfare. The money was derived not only from annual tribute received from the Delian League  city-states , but from rich silver deposits  Athens  owned and mined at Laurium, close to Cape Sunium as well. The mines provide the silver that paid for construction of the fleet that destroyed the Persians at Salamis in 479 BC.

Common to all issues of the coin are the goddess Athena, in profile on the obverse, and the owl, her constant companion, standing on the reverse, a sprig of olive leaves with a berry above its shoulder. Variations in design exist among denominations of the coin.

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Receive The Aid You Will Need In Order To Change Your Locks

When someone acquires a whole new property, they’re going to require keys created for every person in their family. Before they proceed to do this, however, they may wish to contemplate having the locks changed. They could take a look at the locksmiths near me to be able to locate one who might help them change out all of the locks inside the property.

The reason people desire to change the locks immediately is to ensure nobody may enter the property anytime they are not there. Although they could have been told they were presented all replicates of the keys, it’s not necessarily correct. The person may have been presented all of the keys the real estate agent knew of, but there could be ones the previous homeowner didn’t remember. Anytime this happens, there can be somebody who will make use of the keys to enter the property after the new home owner moves in. To protect against this, and also to be able to make sure there isn’t any keys the property owner does not know about, changing the locks is actually needed.

If perhaps you are searching for a locksmith to be able to help you change the locks within your brand-new home, contact one who has been servicing milwaukee for 20 years. They’ll have the experience to be able to help you to have all of the locks changed as fast as possible. Make contact with them right now to be able to find out more.

Edinburgh – The Athens of the North

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Europe may be the second smallest continent in the world, but it is possibly one of the most diverse regions on earth.

The sheer variation in language, culture, architecture and even weather, makes Europe one of the most visited regions in the world, and it’s easy to see why. For modern metropolises there is London, Paris and Barcelona. For warm weather and beaches there is thousands of miles of Mediterranean coastline spanning Spain, France, Italy, Greece and numerous other countries; all with quite distinct historical, cultural and linguistic differences.

But as great as it is to have such massive diversity squeezed into such a relatively small space, it could be argued that there are probably bigger metropolises and better beaches located elsewhere in the world. Indeed, what makes Europe truly special are those ‘one-of-a-kind’ places, and Edinburgh, the capital city of Scotland, is such a place.

Located in the south-east of Scotland close to the River Forth, Edinburgh is often considered to be one of the most picturesque cities in Europe and is certainly regarded as a major tourist destination, attracting around 13 million visitors each year.

But what makes Edinburgh a truly mesmerising city is its landscape and architecture. To realise how stunning a city the Scottish capital is, it only takes a short hike up one of the several hills that the city is built around. Arthur’s Seat, for example, offers perhaps the most panoramic view of the city and is only a mile from the city centre. As an extinct volcano, it consists of rocky crags and basalt cliffs, rising to about 250 metres high and affords magnificent views across the city, with the world famous Edinburgh Castle taking centre stage.

The one striking feature of the Edinburgh skyline is the lack of skyscrapers or any other particularly tall building. This has been a deliberate attempt not to spoil the famous cityscape that has seen both the old and new town districts of Edinburgh listed as UNESCO World Heritage sites.

And it’s these two districts that make Edinburgh what it is. The medieval, windy streets and alleys of the Old Town sandwiched in between Edinburgh Castle and Holyrood Palace, contrasts splendidly with the beautiful Georgian architecture and Greek-inspired neo-classical designs that are spread throughout the New Town.

Indeed, the New Town is generally considered to be a masterpiece of  city  planning and is partly responsible for Edinburgh’s reputation as the ‘ Athens  of the North’, which is quite a compliment considering the esteem in which Greek architecture is held throughout the world.

Of course, like any other city in the world there are all the usual activities to keep visitors happy throughout their stay such as restaurants, cinemas, clubs and pubs; ensuring that hotels in Edinburgh are always in great demand.

But in a city of Edinburgh’s breathtaking beauty, these could be considered merely as distractions from the main attractions. It is difficult to think of anywhere else in the world that can compare to Scotland’s capital city, which is why it truly is, one-of-a-kind.

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