Walk behind a 50-meter-high waterfall.

The deserted pirate-themed restaurant still entices explorers.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

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

An abandoned nightclub has become a vibrant work of art.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

The evocative ruins of a medieval village.

Explore an eerie, abandoned medieval citadel.

This impressive chasm is one of the longest natural underground cavities in the world.

The largest underground church in Europe.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

A breathtaking and biodiverse wilderness in the mountain setting of Ernest Hemingway's "For Whom the Bell Tolls."

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

A dramatic art installation features a BMW flying out of a building in Rotterdam.

This Dutch art piece became a Russian icon.

A massive stone fox oversees a Rotterdam elementary school crosswalk.

The vibrant buildings in the “capital of the comic strip” celebrate the art form that made it famous.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.