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

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

This once luxurious Catskills resort is now a haunting ruin.

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

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

The remains of a failed subway in upstate New York is now an underground graffiti bunker.

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

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

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

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.