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

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

A sewing machine tycoon built this miniature castle for the people and to beautify a lakeshore.

Teddy Roosevelt’s famous “midnight ride to the presidency" started at this small lake high up in the Adirondacks.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

A mysterious echo seems to defy the laws of acoustics.

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

The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.

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

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

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

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

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

The shared home of a utopian commune that practiced "free love" a century before the hippies.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

A CT scan revealed the identity of this 3,000-year-old mummy that everyone erroneously thought was female.

The small burial plot is located in a mall parking lot.

This relic of 19th-century infrastructure is one of the few remaining coal gas storage tanks in the U.S.

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

All that remains of the once-booming chain is a single orange-roofed restaurant.

Buffalo's abandoned concrete grain elevators are getting a second life.

This vessel is believed to be the oldest operating fireboat in the world.

It wouldn't be long after purchasing this farm, Brown would lead his siege on Harper's Ferry.

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