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

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

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

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

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

The "last holdout of the Confederacy” actually sat at the edge of the Canadian border.

This house was the subject of an Edward Hopper painting, which in turn helped inspire the design of the Bates house in Alfred Hitchcock's 'Psycho.'

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

A historic Black graveyard hidden in the parking lot of one of America's largest malls.

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

This giant rock arrived at this quiet park thousands of years ago on the back of a massive glacier.

A whimsical monument deep in this park commemorates the groups that helped build it.