One of the great treasures of Neolithic art lies within this carefully constructed pile of rocks.

This French anatomy museum greets guests with a skinless man, mid-shovel.

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.

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

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

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

Site of one of World War I's most horrific scenes.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.

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

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

From carts to cars, this leftover Roman bridge in France has managed to survive for centuries.

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

The ruins of a medieval castle linked to the murderous French lord that inspired the famous legend of Bluebeard.

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

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

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

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

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

His "Lionheart" is entombed separately from the rest of his body.

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

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

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

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