Medieval Danse Macabre Fresco in Northern Brittany.

A medieval house adorned with enigmatic carvings, including one of a man displaying his masculine attributes.

Sculpture of a legendary French dragon.

Limestone grottoes turns everyday objects into stone.

This Corsican Neolithic site is full of pre-Roman megalithic structures that may or may not be penises.

These ruins reveal the remarkably intact layout of a Roman marketplace.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

Wall after wall of this French seaside neighborhood is intricately decorated with seashells and corals.

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

A poem by Arthur Rimbaud is inscribed on the wall of a street that, while it is only one block long, plays a key role in multiple novels.

This fascinating museum in an old water tower holds the world's largest collection of Vodou artifacts from western and central Africa.

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

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

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

This 1,400-year-old abbey was once a powerhouse for music and intellectualism known across Normandy.

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

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

An unsettling shrine dedicated to the ravenous beast that prowled 18th-century France.

A remote hilltop covered in giant monoliths haunts the Brittany countryside.

The storefront of a ramshackle Parisian puppet theater.

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

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

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