This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

This curious Tudor-era castle was once home to Napoleon's greatest adversary, the Duke of Wellington.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Statue of a decomposing prince that once held his heart in its hand.

A chapel on a volcanic core, marking the end of a successful journey.

Walk through living pictures and music in the Cathedral of Images.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

This army of concretions is an unexplained geological phenomenon unlike anything else in the world.

A unique underground structure dating back to the 1st century BC.

This ancient theater was once the home of fierce gladiatorial battles.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

A former plague hospital turned medical museum.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

What was once a bustling mining installation is now a bustling hub of contemporary art.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

A little sculpture with a large wardrobe.

A fascinating and enormous collection of natural history exhibits stained by a dark colonial legacy.

Meet the bronze beloved pet to a family of famous peeing statues.