This psychedelic tourist trap is a leisurely descent into madness.

Beijing's expansive subterranean hiding spot now crumbles away as a tourist destination.

Thanks to the building of a life-giving reservoir, part of the Great Wall of China is now a dive site.

Forgotten German bunkers in China create a sharp cultural contrast.

A fifth-century temple improbably built into the side of a cliff.

It seems that the residents of of this megalopolis suddenly vanished, but they were never actually there.

The world's first and only natural nuclear reactor.

On the top floor of an upscale department store stands a lavish restaurant housed in a replica of a luxury French dining car.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Oberweissbacher Bergbahn - a broad-gauged cable car capable transfering railcars.

This historic stone bridge has an entire neighborhood clinging to its sides.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

The West's first incursion into the Afghan world lies buried beneath a military base.

Splashes of blue in an otherwise monotonous lunar landscape.

Highly unusual subterranean stupa and adjacent cave monastery.

The Avenue of Mausolea is a series of grand palatial tombs.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

Pyramid home to an obscure religious group that practices modern mummification.

Largest collection of mounted dinosaur specimens in the world.

A small flooded ghost town with a few scattered structures remaining.

Vast stretch of tide-pools with a unique Moroccan charm.