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

The oldest continuously inhabited street in America.

This once-private estate is now a dreamy, meditative garden that's open to the public.

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

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

This isolated community does not want you to visit.

The second largest maple syrup producer in the U.S. runs a high-tech operation.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

This whimsically unique butterfly farm focuses solely on creating habitats for the gentle insects.

The attic and basement house two museums stuffed with oddities like swallowed spoon handles and a shrunken head.

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

This abandoned factory on the Hudson River once churned out a million bricks a week.

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

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

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

Oldest existing wire suspension bridge in the United States.

A winding, cliffside stretch of road overlooking the Delaware River.

Six peaceful acres in a residential neighborhood dedicated to art and peace.

Residents of this Brooklyn neighborhood may be unaware their houses sit atop a buried trolley graveyard.

The second-largest (of only two in the world) large particle collider is the underdog of experimental physics.

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

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

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

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