The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

The largest known open fault in the United States is basically a giant natural refrigerator.

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

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

The remains of what was once the world's steepest passenger funicular.

The land is home to swimming ponies and a legendary 18th-century treasure.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

World's largest collection of serial killer artwork and other macabre exhibits.

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

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

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

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

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

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

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

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

A fictional town that was briefly brought to life before fading once again out of existence.

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

"A hideous albatross in the Hudson River Valley."

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

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

100 massive sculptures in the Hudson River Valley.

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