The ruined doorway is a portal to the building's turbulent and torturous past.

An ancient octagonal weather station named for the eight Greek gods of wind.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

Largest lake in Great Britain measured by surface area.

The deserted pirate-themed restaurant still entices explorers.

A winery built on the site of a Gallo-Roman estate uses historical tools to recreate ancient vintages.

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

This garden houses the remains of the ancient Greek port of Marseille.

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

Sleep in a climate-controlled plastic bubble for the night.

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

Artist Danielle Jacqui decorates nearly every inch of her home inside and out with her work.

This workshop and small museum is dedicated to tiny, delicate figurines that began as a subversive craft after the French Revolution.

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

Avant garde house of Pierre Cardin on the Cote d’Azur.

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

One of the largest ochre quarries in the world, hidden in a limestone landscape.

One of the greatest maze designer’s greatest mazes.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Nicknamed the "Museum of Horrors," this French anatomical collection has been fascinating visitors for over a century.

A tiled, multi-level garden of survival in Lyon.

The fantastic architectural models of a French traveler.

This hidden garden boasts amazing views of Lyon.

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