Also known as the Great Mosque of Damascus, this is one of the world's largest and oldest mosques.

The longest staircase lock in Britain.

Two minuscule windows are tucked inside this medieval building.

Over time, this castle grew to encompass the entire island.

Now in ruins, this castle stood for centuries and saw a number of gruesome events.

On a hill overlooking Loch Trool, a granite boulder marks the site where Robert the Bruce, King of Scotland, defeated an English army.

With over 10,000 lights, this engineering marvel lights up the city after dark.

This monumental work of art symbolizes the coming together of a previously divided city.

Home to one of the most popular teams in Scottish football history.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

One of the oldest and largest castles in the world.

This no man's land slicing through the island is strewn with abandoned relics of another time.

Three memorials honor the victims of the worst sports stadium disaster in Britain.

This charming railway is one of the oldest and steepest funiculars in England.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

A rotating bridge that carries a little canal over a larger one.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

A 11-foot former president stands on a Kosovo street that also bears his name.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

A pub that is literally in the middle of nowhere, but continues to do business.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

Mysterious lost empire of the Silk Road.

Single runway interrupted by a busy road that cuts across its middle.