A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

Resting on a hill overlooking the coast, these medieval ruins look completely deserted save for their restored chapel.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

A Parisian boutique devoted to la Sape, the elegant Congolese fashion subculture rooted in European colonization.

For over 300 years this little carving has been the city’s good luck charm.

Natural mummies hidden in the crypt of a medieval French church.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

Legend has it this 11th-century castle was paid a visit from the devil.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

100-windowed castle turned art gallery, built by one dedicated mason.

The world's most famous cheese caves.

To the famous surrealist artist, liberty required two torches held high.

Tens of thousands of ancient rock carvings hidden in the heart of a French national park.

Series of underground houses inhabited continuously for centuries.

One man's desire to transcend art led to the construction of this outsider chapel.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

A massive, secret marina for the Nazis' most formidable weapon in the Atlantic.

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

French commune at the heart of conspiracies.

An architectural oddity of six stories, accessed by graceful ramps.

France's high-tech, future-themed amusement park.

Figures of unknown origin carved into the surfaces of underground caves.

This 14th century wine cellar is home to the oldest barrel-stored wine in the world.

Since it formed millions of years ago, this cave system has been a sacred burial ground, a Prohibition-era speakeasy, and the center of an amusement park.