A surrealist timepiece by the artist of melting clocks.

A museum of magic with a Sadist past.

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

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

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

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

A haunting collection of the vanished and disappearing natural world.

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

Paris' linguistic guide to the international language of, yes, love.

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

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

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

Notorious artist squat renovated into legal studios.

Abandoned railway line circling the city of Paris.

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

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.

It's believed Matilda Fitzwalter's life was the basis for the famed literary figure.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

What started as a way to address damp basement walls turned into a house filled with intricate hand-carved designs.

A faded reminder of what was once a common sight in London during the Blitz.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

The Florence Nightingale Museum is home to the famous nurse's most treasured possession: her beloved pet owl.