The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

An abandoned quarrying village turned commune is now a hub for learning the Welsh language.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

An abandoned Soviet-era mining town in the mountains of South Kazakhstan.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

A forgotten and crumbling Yugoslav monument to the victims of fascism.

The deserted pirate-themed restaurant still entices explorers.

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

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

The now-abandoned Fascist summer colony served a dark purpose during World War II.

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

An abandoned shopping gallery built during Fascist Italy tucked in the center of Palermo.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

An abandoned movie set in the desert of West Texas.

Terrifying derelict military hospital once housed a recuperating Hitler.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

Abandoned concert venue legendary for its rock counterculture.

A Turkish ghost town abandoned in a population exchange with Greece.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.