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

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

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

An atmospheric, medieval-themed book store hides in a 13th-century underground space.

Green labyrinth formed by a karstic maze hidden in a preserved oak forest.

A unique zoological park home to over 30 species of wild cats, both big and small.

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

This otherworldly French waterfall looks like its waters have turned to stone.

A massive, secret marina for the Nazis' most formidable weapon in the Atlantic.

Located in the house where Gustave Flaubert was born, this odd museum has more to do with medical grotesquery than the Western novel.

Bits of architecture from a town destroyed in World War I now decorate this hotel garden.

A bike train runs along a disused railway line through the tranquil French countryside.

Statue of a decomposing prince that once held his heart in its hand.

If they push on just the right spot, even the weakest person can move this titanic boulder.

An art world insider finds himself battling for his artistic home.

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

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

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

A centuries-old complex of hand-dug stone chambers has sheltered locals in times of trouble.

The world's tallest bridge is also possibly the most elegant.

The post-apocalyptic remnants of a bucolic town ruined by a plane crash.

The remains of 40,000 humans, meticulously stacked in a tiny churchyard shed.