This French "sea of rocks" is packed with stunning rock formations and its own medieval castle.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

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

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

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

French commune at the heart of conspiracies.

These medieval ruins have survived since the 12th century, even providing shelter from the Nazis.

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

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

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

This otherworldly French waterfall looks like its waters have turned to stone.

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

Green labyrinth formed by a karstic maze hidden in a preserved oak forest.

A sanctuary for wolves in a community which once trembled in fear of the murderous "Beast of Gévaudan."

One of the largest ochre quarries in the world, hidden in a limestone landscape.

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

The 16th-century church was kept in its ruined state as a reminder of the casualties of World War I.

A colossal sculptural lion built by the same man who designed the Statue of Liberty.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

Bits of architecture from a town destroyed in World War I now decorate this hotel garden.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

The deserted pirate-themed restaurant still entices explorers.

An abandoned beach resort in Normandy reclaimed by artists.

The post-apocalyptic remnants of a bucolic town ruined by a plane crash.