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 birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

The metal leaves on this tree are engraved with the names of Holocaust victims.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

This giant statue of a vulva became internationally famous after an American exchange student got stuck in it.

The fairy tale castle of the "fairy-tale king."

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A collection of artworks exclusively created by the mentally ill that was almost burned by Nazi culture police.

One of the most easily accessible examples of the rare 1960s UFO houses.

The footprint of a frustrated devil in Munich's Cathedral.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A hole in the floor of this chapel is said to have been created by a footprint of the devil.

In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

The world's most delightful not-NOT-religion welcomes visitors to the town of Templin, just like its more stoic peers.

Ample proof that watery ends make for well-preserved, millenia-old mummies.

This 600-year-old home seems to defy physics.

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

"The most colorful grottoes of the world.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A striking 12th-century-style castle built on the edge of a cliff.

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

Art and a pun, all in one.