Destroyed by flood waters, prison now serves as a training ground for armed forces.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

Abandoned Coast Artillery fort now serves as graffiti canvas and sightseeing vantage point.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

This abandoned radar station from the Cold War era now only broadcasts a seriously ominous air of isolation.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

An abandoned castle owned and ignored by Masons carries a cursed history.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

During the 1990's nearly all of the world's LSD is thought to have come from the operators of the lab once located in this missile silo.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

This once luxurious Catskills resort is now a haunting ruin.

A long abandoned hospital building on the outskirts of NYC.

An abandoned meat mecca now serves as an excellent locale for urban exploration.

This abandoned amusement park was built on a site with a dark history.

When this test site was abandoned, they didn't even bother to take the rocket with them.

If astronomy had a ghost, it would look like this observatory.