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

France's highest manned weather station is the only one still inhabited by meteorologists.

Live-in sculpture begun by one family in 1979.

Grottoes, sculptures, and recycled ceramics permeate what was once just a small farm in France.

A snowy highland notorious for unexplained aircraft crashes is France's own Bermuda Triangle.

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

The second-largest natural arch in the Chartreuse Mountains.

According to a local legend, this peculiar mountaintop rock formation is actually a demon that was turned into stone.

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

This church looks more like a spaceship than a house of worship.

Natural mummies hidden in the crypt of a medieval French church.

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

A Christian retreat founded to welcome refugees fleeing from the Nazis during World War II.

Erosion left these fascinating granite formations strewn across fields and mountains in Burgundy.

Reminiscent of a termite mound, this imposing structure is likely an ancient funerary monument.

Was the twisted roof on this church's belltower an intentional design or a happy accident?

An unusual, funny and fantastic open air museum.

The beautiful bas-relief lines a sliver of a 19th-century walking path between two charming French villages.

An abandoned nightclub has become a vibrant work of art.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

This impressive chasm is one of the longest natural underground cavities in the world.

A sanctuary for wolves in a community which once trembled in fear of the murderous "Beast of Gévaudan."

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.