Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A house carved into a rock in the 1940s.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Outsider art meets paleontology at this roadside reptile repository.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

A monument to the man who almost killed Hitler.

This little museum is making sure that the art and history of the graffiti sticker is not scraped from history.

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

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

An eerie, derelict amusement park in Berlin.

A Bed-Stuy gymnasium that hosts expansive raves, performances, dance parties, and more.

World's first "penitentiary," meant to be humane, drove men insane.

A layered tribute to the work of mosaicist Isaiah Zagar.

Dr Barnes' $25 billion private collection of art and arboretum.

Century-old shop, specializing in Occult products.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This Costa Rican topiary park is a surreal garden of unearthly delights.