This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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

You can spend the night in Dr. Frank-N-Furter's castle.

An often-shuddersome journey into a low-tech, robotic themepark.

These medieval ruins have survived since the 12th century, even providing shelter from the Nazis.

This ancient theater was once the home of fierce gladiatorial battles.

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

Series of underground houses inhabited continuously for centuries.

Walk through living pictures and music in the Cathedral of Images.

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

Sculpture of a legendary French dragon.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

A museum of magic with a Sadist past.

A haunting collection of the vanished and disappearing natural world.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Abandoned railway line circling the city of Paris.

Notorious artist squat renovated into legal studios.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

The vast, legendary catacombs hold secrets much stranger than stacked bones.