The abandoned personal amusement park of the King of Pop.

Austria's very first and only nuclear power station was completed but never used.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

An old department store turned Nazi prison turned artist commune.

A museum dedicated to the history and exploration of both popular music and science fiction.

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

Striking occult iconography on a medieval German church.

Go surfing on this urban wave, "hacked" by local surfers.

This "mathematical tower" was an observatory, early skyscraper, and place to reflect on all of nature and the cosmos.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

A Saint Nicholas-themed ghost town in the Mojave desert.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

One of the ghostly stops along Route 66.

The ghost town that ended up on Ebay.

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.