A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

This vessel is the final ocean-going paddle steamer in the world.

The world's largest wooden structure.

This one-time health resort was used by aristocrats around the world.

A public work of art that also provides some relief from the summer heat.

A whimsical bridge adorned with decorative dragons.

An unfinished Serbian Orthodox church with 1,389 golden crosses planned to represent the Battle of Kosovo.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

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

A futuristic, brutalist masterpiece that is also strangely prison-like.

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

This is the oldest Roman-made bridge in the city still existing in its original state.

Three-story concrete ram with a permanent gift shop.

A sculpture of a beloved local figure, who tipped his top hat to everyone he passed on the streets of Bratislava.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

One of the oldest bridges in Norwich was used during the English witch trials and is said to be haunted.

A free public golf course hides in plain sight in the heart of Scotland’s capital.

Now home to a drinking establishment, this building has a macabre history.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

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

Come for the flowers, stay for the bats!

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

This bridge was constructed from the rubble of the infamous Bastille.