One of the last realized projects of an influential, self-taught, French Modernist architect Jacques Couëlle.

Hundreds of hidden passageways weave through the old quarters of Lyon.

One of the greatest maze designer’s greatest mazes.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

The experimental test tracks of a retro-futuristic monorail still stand in the French countryside.

Shattered columns and Egyptian pyramids outside of Paris.

One of the most powerful religious centers in the Middle Ages, dubbed the founder of Western monasticism.

For a brief time in 1960s France, families could climb into a tiny submarine and be pulled along an underwater journey.

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

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

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

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

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

Personal garden filled with mosaics made of recycled garbage.

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

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

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

The man who introduced reinforced concrete to the world demonstrated its genius by using it to build his own house.

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

100-windowed castle turned art gallery, built by one dedicated mason.

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

Fighting the British and making game shows for over 150 years.

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

French commune at the heart of conspiracies.