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

This once sprawling resort now sits abandoned, filled with graffiti and vibrant colors from an era long passed.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

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

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

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

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

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

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.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

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

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

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

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

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