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

This natural rock "church" might not be a proper chapel but that doesn't mean it's not beautiful.

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

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

"A hideous albatross in the Hudson River Valley."

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

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

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

An upstate New York garage advertises its services by literally putting the automobile above all else.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

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

Locals purchased this abandoned quarry in order to make sure it continues to be overgrown.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

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

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

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

Resonating tubes make music from highway overpass.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

The Hudson River School comes alive at this palatial estate.

The first evidence of some of the Earth's earliest life was found in this fossilized undersea grotto.

Two mermen, eternally spitting into each other's mouths.

This locally-famous crevasse in New York State is icy all year round.

A monument to the military service of America's greatest traitor refuses to even name him.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.