A castle that was built stone by stone by an eccentric journalist.

Medical and zoological curiosities for sale.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

Inside a former cabaret, seven floors of erotic art.

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

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

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

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

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

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

A haunting collection of the vanished and disappearing natural world.

A museum of carnival attractions where you are invited to ride the rides.

A museum of magic with a Sadist past.

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

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

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

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 church filled with the bones of hundreds of virgins martyrs—or so they say.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

A Museum of Psychiatry in a still-operating mental institution.

Only museum in the world devoted to bookbinding and book arts holds a permanent collection representing five centuries.

This impressive collection of skulls and bones was gathered by an ex-zookeeper who took advantage of a pig plague.