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

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

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

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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

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

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

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

A museum which takes visitors to the côté obscure of Paris.

Former hunting lodge of a duke who was an avid collector of impressionist works.

A French artist's vague warning hangs over Belleville.

This banal Parisian entranceway is not what it seems.

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

France's national museum of scientific and industrial instruments.

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

One of the oldest masonic museums in Paris.

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

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Two thousand artifacts from around the world collected by one woman who loved to travel.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.