Medieval Danse Macabre Fresco in Northern Brittany.

One man's stunning attempt at eco-friendly living.

This abandoned church in central Lyon is missing its front stairs.

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

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

An abandoned nightclub has become a vibrant work of art.

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

A beautiful lighthouse with as many steps as days in the year, as many windows as weeks, and as many levels as months.

This striking fort on the Maginot Line looks just as it did after being destroyed in the Fall of France.

Beneath the city of Lourdes, France is a massive, concrete church.

Now a memorial, this factory was once used as a concentration camp for artists by the Vichy government.

Limestone grottoes turns everyday objects into stone.

For more than a century, Parisians have come for affordable dishes in a grand converted train station.

A small town hallucinates en masse - Bad bread, or CIA science project?

The site of the first medieval crusade that pitted Christians against Christians.

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

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

1920's reinforced concrete church by architect Auguste Perret changes the face of modern design.

Grab a life-changing ham sandwich at this former horse butchershop.

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

A former milk-delivery driver and his wife turn their home into a glimmering mosaic.

Half a century after it was abandoned, this ghost town is coming back to life.

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

The haunting concrete remains of a Nazi pebble crusher can still be found in this small French commune.