Series of underground houses inhabited continuously for centuries.

One man's fifteen-year diversion lead to a garden of intriguing sculptures.

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

French Time Capsule-19th Century home revealed to the public.

Live-in sculpture begun by one family in 1979.

Former bridge turned into an observation tower.

An architectural oddity of six stories, accessed by graceful ramps.

A towering baroque basilica jutting out of the French countryside.

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

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

Immortalized by artists, this church incorporates a medieval lighthouse into its shoreside structure.

A French library that makes sure its love of books is writ large... giant in fact.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

One architect's organic, human-centric design has been fully realized in this alien art house.

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

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

A medieval church built into an ancient cave.

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

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

A unique underground structure dating back to the 1st century BC.

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

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

One man's desire to transcend art led to the construction of this outsider chapel.

An enchanting work of outsider art, full of whimsical sculptures and carvings.