These disused steel furnaces are now haunting ruins that may one day be a national park.

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

Pennsylvanian mass grave and possibly mass murder.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Abandoned concert venue legendary for its rock counterculture.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.