On the Oregon coast there is a natural hole that seems to be draining the sea.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

An obscure waterfall that looks like something out of a fantasy novel.

This former fascist summer camp was abandoned for decades.

This abandoned horse racing track was an exercise in hubris from its inception.

This massive subterranean fissure is known as the "underground Grand Canyon."

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

A war-torn Olympic relic is being overtaken by graffiti and nature.

The house that Southern rock built now stands as a monument to one of the genre's favorite families.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

This Belgian theme park began as a refuge for bored church children and was closed down when a boy lost an arm.

Once swallowed by flood waters, this village has emerged as an eerie shadow of its former self.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

This Swedish automobile graveyard is a beautiful gallery of decay, but woe be to any who would steal a souvenir.

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

This half-finished "city of toys" was almost Italy's own Las Vegas.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.