Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

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

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

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

Town full of spiritualists, some of whom are mediums, is still in full swing after 130 years.

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

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

This once luxurious Catskills resort is now a haunting ruin.

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

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

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

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

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

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

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

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

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

This abandoned asylum in Wales might look haunted, but it's still beautiful.

Created by four famous men (Henry Hobson Richardson, Frederick Law Olmsted, Calvert Vaux and Thomas Story Kirkbride), the beautifully designed Buffalo State Asylum was resurrected as a hotel and art center...but still boasts a ghost story or two!

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

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.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.