A Belle Epoque bordello turned into a themed love hotel.

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

A haunting collection of the vanished and disappearing natural world.

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

The first green space constructed on an elevated viaduct.

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

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

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

19th century pendulum and a clock restored by a rogue group of guerilla artists.

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

The very center of Paris is surrounded by a bevy of strange good luck rituals.

A museum of magic with a Sadist past.

A mechanized clock where a man fights off a dragon, crab, and rooster.

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

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

Notorious artist squat renovated into legal studios.

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

Statue of death tucked in the University of Medicine courtyard.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

A wunderkammer of exoticism immortalized by Tom Waits.

This curio museum seems like the type of place you might find a mogwai or a monkey's paw.

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

This collection started by a Cornell professor once held more than 600 human brain specimens, including the one that belonged to its founder.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.