This lesser-known leaning tower is all that remains of the medieval castle of Vernazzano.

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

Half a century after it was abandoned, this ghost town is coming back to life.

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.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

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.

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.

270 million year-old forest of stone.

Nature took her revenge on the "Wickedest City in the World."

The ruins of this medieval castle on a foggy hill tell the story of a once-mighty empire.