This secluded walking trail is a hidden gem of a Pittsburgh park.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

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

"Gnome Chomsky" was once the largest gnome in the world, but is now simply tall for his kind.

At this small shop off a dirt road in the forest, the specialty is eel the owner caught and smoked himself.

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

Oldest existing wire suspension bridge in the United States.

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

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

The largest Buddha statue in the Western Hemisphere is just 50 miles north of NYC.

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

The deserted remains of a luxury hotel turned hospital ward.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

"A hideous albatross in the Hudson River Valley."

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

This old cement mine has been used as everything from a mushroom farm to a recording studio.

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

It was once the base for a series of domestic terror attacks.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

They sort through millions of dollars worth of diplomatic gifts on behalf of the government.