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

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

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

An abandoned relic of the city's failed experiment with below ground transit.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

Tombstones buried in overgrown grass mark the deceased occupants of this abandoned graveyard.

Abandoned castle was once a grand example of Russian privilege, built exclusively to win a frivolous bet between noblemen.

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

An abandoned munitions factory with a shot tower continues to wage war on the surrounding environment.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

This abandoned motel doesn't welcome guests anymore, but decay and a creepy atmosphere still call it home.

A beautiful deserted greenhouse in the middle of a park.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

Abandoned soda factory on a Cambodian roadside in a state of beautiful decay.

One of the world's largest malls has been almost completely empty since its opening.

This attraction was abandoned after the Chernobyl disaster.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

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

A pier that used to act as a busy ferry dock is now a decaying favorite of local fisherman and urban artists.

This abandoned mansion has a window for every day of the year, and is a temple for ghost hunters.

Long abandoned underground complex to keep royals safe from a nuclear war that never came.

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