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

The Hudson River School comes alive at this palatial estate.

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

"A hideous albatross in the Hudson River Valley."

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.

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

The oldest continuously inhabited street in America.

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

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

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

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.

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

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.