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

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

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.

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

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

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

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

Hundreds of dwarf beeches create an unusual, haunting forest in the north of France.

A small house sits between two huge rocks, with its back to the sea.

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

This lesser-known Frank Gehry building houses a treasure trove of cinema history.

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

The Church of the Annunciation was carved into the face of a cliff, just like the rest of the town of Haute-Isle.

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

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.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

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

The encased skull that is widely believed to belong to St. John the Baptist.