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

A toxic ghost town sitting atop a massive coal fire.

An abandoned castle owned and ignored by Masons carries a cursed history.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A long abandoned hospital building on the outskirts of NYC.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

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

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

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Two monstrous warehouses. One now holds priceless works of art, the other stands abandoned and dilapidated.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

Abandoned power station once home to a squatter community, now being developed into an arts center.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

Abandoned Coast Artillery fort now serves as graffiti canvas and sightseeing vantage point.

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

The kind of mixed-up place that drives archaeologists crazy.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

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

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

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

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

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

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