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

Toxic waste disaster that founded the Superfund program.

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

A formerly abandoned mental institute, now back in business.

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

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

This once luxurious Catskills resort is now a haunting ruin.

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

A long abandoned hospital building on the outskirts of NYC.

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

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

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

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

This mouldering abandoned mental hospital was once a center for progressive healing.

This abandoned ironworks was once the most important military supplier in America.

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

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.

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

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

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