The world's most awe-inspiring walls - These magnificent walls were built either as defensive constructions, or to mark borders between countries. Today, many of them are still standing and tell fascinating stories from the past. Each year tourists flock to discover the history behind these impressive monuments.

Check out the most awe-inspiring walls in the world!

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Berlin wall (Germany) - The famous wall was built in 1961 at the height of the Cold War to divide East and West Germany.

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Berlin wall (Germany) - The wall effectively split the city of Berlin in half, until in 1989 when it was taken down. Today, parts of it are still standing and these have become tourist attractions.

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Berlin wall (Germany) - There are graffiti on some parts of the wall, which are worth visiting. The construction is one of the historic symbols of Berlin.

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Hadrian's wall (England) - The wall was built in stone and wood as a defensive fortification by the Romans, to set the border between Scotland and England.

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Hadrian's wall (England) - At 117 km long, it's one of England's most famous historical monuments. It has been well preserved and is a popular tourist spot.

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Walls of Ávila (Spain) - This is the best preserved Medieval wall in Europe. Ávila's majestic fortifications surround the oldest Gothic church in Spain.

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Walls of Ávila (Spain) - The construction of the walls began at the end of the 11th century under the reign of Alfonso VI of León and Castile. Today, they are still in great condition, and are one of Spain's most iconic features.

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Great Wall of China (China) - This defensive wall was built between 220 and 206 BC under the reign of Qin Shi Huang, China's first emperor.

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Great Wall of China (China) - The construction was later improved upon and rebuilt several times.

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Great Wall of China (China) - The 8,850-km-long wall is one of the Seven Wonders of the World and also one of the planet's most visited monuments.

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Vietnam Veterans Memorial (USA) - A monument was built in Washington D.C to commemorate the members of the armed forces who fought and died for the US in the Vietnam War.

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Vietnam Veterans Memorial (USA) - The memorial wall was built in 1982. It is 75 meters long and has all the names of the soldiers who lost their lives in the combat inscribed on it.

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Walls of Constantinople (Turkey) - These impressive stone walls were built to protect the Turkish city of Constantinople, (currently Istanbul).

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Walls of Constantinople (Turkey) - The monument has been well preserved over the years and can be seen in the city of Istanbul, an unmissable tourist spot!

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Sacsayhuamán (Peru) - This Inca fort, which today is in ruins, was originally built for military purposes just outside the city of Cuzco.

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Sacsayhuamán (Peru) - The construction of the fortress was started before 1438 by Pachacuti Inca Yupanqui, and today it is a cultural symbol of Peru. In 1983, it received UNESCO World Heritage Site status.

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Walls of Babylon (Iraq) - Ancient Babylon, in historical Mesopotamia, is situated 85 km south of Baghdad, and it was surrounded by walls, which date back to 575 BC.

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Walls of Babylon (Iraq) - Babylon used to be defended by various walls that surrounded its different areas.

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Walls of Ston (Croatia) - This series of defensive stone walls were built to protect the city of Dubrovnik and included 40 towers and five forts. It was known as 'The Great Wall of China' of Europe.

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Walls of Ston (Croatia) - The building of the seven-km-long construction started in 1358, and today it is the second largest wall in Europe, superseded only by Hadrian's Wall.

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Walls of Troy (Turkey) - This monument is one of the oldest walls still standing and is in a reasonably good state of preservation.

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Walls of Troy (Turkey) - It's estimated to have been built sometime before Christ to protect the city of Troy. Today it's an ancient historical site that is worth visiting.

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Wailing Wall (Israel) - Located in Jerusalem, the Wailing Wall is a sacred place for Jews.

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Wailing Wall (Israel) - The monument was built in 19 BC by Herod the Great, and today is a shrine for Jews. It is one of the most visited attractions in Israel.

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Great Zimbabwe (Zimbabwe) - Great Zimbabwe is a complex of stone walls that is still standing today and which represents one of the country's greatest historical relics.

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Great Zimbabwe (Zimbabwe) - The old city is in ruins today, but its impressive walls still stand.

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Walls of Elvas (Portugal) - The walls of Elvas constitute the biggest bastion fort in the world. Construction began under the reign of Sancho II and was completed somewhere between the 17th and 19th centuries.

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Walls of Elvas (Portugal) - Encompassing an area of 300 hectares and with a perimeter running from eight to 10 km long, these magnificent walls are a UNESCO World Heritage Site.

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Masada (Israel) - This fort in Judea has steep cliffs and rough landscapes. Today, only ruins remain.

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Masada (Isreal) - The primitive construction has been impossible for historians to identify accurately, but nevertheless in 2001, it was considered a World Heritage Site.

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