The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

This tiny little island has, as the name says, just enough room for its single house.

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

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

An isolated beacon with a history of grisly murder and a view of some of literature's greatest inspirations.

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

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

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

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

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

Rummage through this sunken ship, but leave your scuba gear at home.

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

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

Why have you never heard of the second most popular tourist site in New York?

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

An abandoned asylum where patients have been forgotten but their possessions remain.

Protecting the future of some of the rarest and most misunderstood mammals of North America.

This once luxurious Catskills resort is now a haunting ruin.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

A once grand hotel is being retaken by the wilderness it once capitalized on.

Try not to get slimed in Tribeca.

Collapsing castle on the Hudson river was once the storage site of military surplus business.