A chapel on a volcanic core, marking the end of a successful journey.

Since ancient times these picturesque springs have been providing bathers with healing waters.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

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

Series of underground houses inhabited continuously for centuries.

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

Despite centuries of architectural innovation, this French castle is being built like it's the 13th century.

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

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

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

Hundreds of dwarf beeches create an unusual, haunting forest in the north of France.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

There has been an astronomical clock on this spot since the 14th century.

The oldest stone house in Paris was built by its most famous alchemist.

Experience architect Le Corbusier's modernist design for living in the home he designed for himself.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

Former hunting lodge of a duke who was an avid collector of impressionist works.

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

Statue of death tucked in the University of Medicine courtyard.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

An ancient monastery, a locked room, and a mysterious book heist.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

Beautiful carved tunnels.