The loneliest island in New York.

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

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

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

Astonishing collection of helmets, scientific instruments, and medical models.

This sprawling taxidermy collection celebrates the art and history of sport hunting.

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.

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

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

A formerly abandoned mental institute, now back in business.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

An eccentric playboy's astounding natural history collection.

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

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

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

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

The 100-year-old public collection of a New Hampshire dentist that contains taxidermy, Native American artifacts, and a pair of mummy hands.

This roadside attraction attracts kids with dinosaurs before blindsiding them with geology.

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

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

The "original web site," this farm in Northern Vermont encourages orb-weaver spiders to build their daily webs, and then sells the preserved masterpieces.

A museum designed by and dedicated to P.T. Barnum in the town where he is buried.