Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

One man's ambition created this psychedelic log home.

This abandoned factory on the Hudson River once churned out a million bricks a week.

The remains of this early 20th century refinery loom on a mountainside like a graffiti-covered fortress.

A Saint Nicholas-themed ghost town in the Mojave desert.

This Florida arena, once host to "the fastest game in the world," has sat empty for 25 years.

The haunting remains of a failed housing development can still be found behind the big box stores that were to anchor them.

The ruins of a Florida miracle spring resort make it seem like a wonder that this was ever a health spa.

Crumbling crypts and overgrown graves rise just out of arm's reach in this forgotten Buenos Aires graveyard.

This old mining town, deep in the California desert, has a year-round population of one.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

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

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

Derelict airplane bodies serve as both home and income for three Thai families.

This sprawling, formerly elite sporting complex in Amman, Jordan has become a local picnic spot.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

Along the old Route 66 is an abandoned trading post made from old telephone poles, built by a former circus clown.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

A former connection to City Island, it has been abandoned since the 1930s.

This airfield is home to a number of retired vintage planes in various states of disrepair.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.