An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Before 1993, this historic-looking village—King Charles III's pet project—didn’t exist at all.

This underground power plant looks more like a super-villian's lair than a public work.

This graceful little figure is a one-of-a-kind version of the cherished character.

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

The only runway directly into the magic kingdom has been closed since 1972, but it still sings to you if you drive fast enough.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

A small, fascinating fire museum hidden in plain sight in an administrative building.

The largest drain hole in the world.

A cave 150 feet beneath Kansas City is the perfect climate for growing 10,000 delicate orchids.

Frank Lloyd Wright died a year before construction on his largest public project even began.

This former Mormon settlement is reemerging from the receding waters of Lake Mead.

Sasqu(w)atch out!

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

Moss and stone turn this waterfall into an otherworldly liquid veil.

Commonly referred to as the most photographed Victorian home in the United States.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

The secluded site of a 1943 plane crash and amazing rescue is only accessible by hiking through the woods.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.