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

The remnants of a 19th-century ironmaking complex hidden in the woods of Connecticut.

The largest Buddha statue in the Western Hemisphere is just 50 miles north of NYC.

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

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

"Gnome Chomsky" was once the largest gnome in the world, but is now simply tall for his kind.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

Believe It or Not, Ripley once called this chiseled mountainside “New York’s Mount Rushmore”.

"A hideous albatross in the Hudson River Valley."

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

This stave church nestled in the Catskills was built in the 1960s by a community of Ukrainian immigrants and refugees.

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

Eight whimsical acres of metal art.

Three acres of mythology-inspired sculptures are visible from the highway.

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

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

The schoolhouse where Jesse Merwin, the inspiration for the "The Legend of Sleepy Hollow" character, once taught.

One man's swirling six-acre monument of stone.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

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

A small Second Empire-style building is one of only seven remaining lighthouses on the Hudson River.

The Hudson River School comes alive at this palatial estate.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.