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

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

The world's most famous cheese caves.

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

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

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

An ancient ossuary in Rouen.

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

A medieval church with largest and oldest collection of Renaissance frescoes in France.

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

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

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

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

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

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

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

This is what trains will look like after the zombie apocalypse.

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

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

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

The world's largest reflecting pool is just two centimeters deep.

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

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

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