Limestone grottoes turns everyday objects into stone.

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.

A castle-like sea fort from the 17th century is now a museum to oyster farming.

On this romantic tidal island reachable only at low tide the tomb of a famous French writer overlooks the sea.

Trek up this glacier before it disappears.

A granite rock formation littered with various species of moss, lichen, and fern.

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

This crack in France's seaside cliffs once hid a sinister secret.

An often-shuddersome journey into a low-tech, robotic themepark.

A village of art and exotic creations.

15,000 year old bison sculptures.

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

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

Longest canal tunnel in the world, abandoned in the 1960s.

An unusual sand beach in the middle of a forest.

Folklore and history carved into Brittany's coast.

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

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

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

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

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.

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

This army of concretions is an unexplained geological phenomenon unlike anything else in the world.