These mouldering mansion ruins remember a time when the Catskills were nothing but luxury.

Eclectic architecture in the woods of New York.

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

This small, hidden cove is home to abandoned boats.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

Three acres of mythology-inspired sculptures are visible from the highway.

A castle built for love, and abandoned due to heartbreak.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

Home on the Hillside, and home of the first breakfast cereal.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

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.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

Thriving meadows span a rooftop in one of Brooklyn's most heavily industrialized neighborhoods.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

The oldest living tree in Manhattan comes shrouded in sinister legend.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

This abandoned subway station can still be seen on regular commuter trips.

The loneliest island in New York.

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.