This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This museum houses an imposing skeleton army comprised of creatures great and small.

A surrealist timepiece by the artist of melting clocks.

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

This Parisian café sticks almost exclusively to an ethos of reuse.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

A haunting collection of the vanished and disappearing natural world.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

This massive library holds what was once the largest book collection in the world.

Notorious artist squat renovated into legal studios.

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

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Abandoned railway line circling the city of Paris.

France's most famous cemetery, with some of its most curious tombs.

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.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

A schoolhouse and chapel are all that remains of this alpine village.

The mountaintop inspiration for Umberto Eco's "The Name of the Rose."

A fake medieval village in the middle of Turin.

Europe's simulation of the Martian surface uses soil from Mount Vesuvius.

When this funny little building went up in the 19th century, most people thought it would simply fall over.

This building has a giant piercing through one of its corners.