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.

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

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

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

An ancient glacial pothole waterfall in the heart of the Green Mountains.

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

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

A 10-foot-tall concrete Alley Oop statue left over from World War II now stands on the side of the road.

Secluded amid upstate New York’s Adirondack Mountains lies this subterranean emblem of a nation on the brink of nuclear war. And it's for sale.

A castle built for love, and abandoned due to heartbreak.

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

This island castle contains enough secret passageways to support a season of Scooby-Doo episodes.

The summit Roosevelt conquered before he descended to become The Chief.

Hike deep into the woods to explore this Gilded Age masterpiece.

This cavernous abandoned marble mine is popular with ice skaters in the winter.

The world’s largest underground marble quarry is hiding in Vermont.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

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

This Central New York ghost town was once a prosperous railroad community.

These mouldering mansion ruins remember a time when the Catskills were nothing but luxury.

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

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