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

The Argonaute submarine was the French navy's pride and joy in the 1950's.

The deserted pirate-themed restaurant still entices explorers.

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

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

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

An abandoned beach resort in Normandy reclaimed by artists.

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

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

A medieval military street hidden beneath a charming French fishing village.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

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

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

These quaint French houses dangle precariously over a precipice.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

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

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

An aluminum skeleton brings Chinese mythology to the French shore.

A Gothic cathedral created from volcanic rocks.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

This massive blockhead sculpture hides an entire library.

The largest underground church in Europe.

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