Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

France's national museum of scientific and industrial instruments.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

A unrivaled and rather horrifying collection of wax dermatological models.

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

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

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

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

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

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

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

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The oldest stone house in Paris was built by its most famous alchemist.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

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

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

Notorious artist squat renovated into legal studios.

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

A hospital closed seemingly in the middle of operations, leaving behind fodder for horror films and ghost hunters.

America's most famous piece of self-built architecture.

Medical and zoological curiosities for sale.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.