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

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

Dedicated to the art of hunting, with juxtapositions of contemporary art.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

Inside a former cabaret, seven floors of erotic art.

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

A haunting collection of the vanished and disappearing natural world.

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

Abandoned railway line circling the city of Paris.

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

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

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

An unusual number plate signifies the building's saucy past.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

Indents in the pavement are all that remain from a grisly death machine in Paris.

A unrivaled and rather horrifying collection of wax dermatological models.

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

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

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

A museum of magic with a Sadist past.