This massive blockhead sculpture hides an entire library.

A place to see how French aristocrats lived in the early 1900s.

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

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

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

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

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

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

This Parisian café is dedicated to great tea and the art of knitting.

This recessed garden protects thousands of mountain plants by creating its own microclimates.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

This demon atop the Notre-Dame de Paris looks utterly bored.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

France's national museum of scientific and industrial instruments.

A museum of magic with a Sadist past.

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

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

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

Abandoned railway line circling the city of Paris.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This banal Parisian entranceway is not what it seems.

This museum in a Paris apartment gives a unique look at the iconic French singer's life.