The rusting remains are visible sticking out of the waters of the Delaware Bay.

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.

World War II bunker still standing on the New Jersey beach.

Step inside Lucy, the world's largest "elephant."

An alternate history park where the Union Army loses the war... to dinosaurs.

Exact replica of the ancient monument, but much, much lighter.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Outsider art meets paleontology at this roadside reptile repository.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

This Old Testament garden features 100 plants from biblical times.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

In the early 1800s, surgery was also a show.

A museum dedicated to exhibiting remarkable outsider art.

This Art Deco service station has been providing tune-ups and turning heads for close to a century.

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.

World's first "penitentiary," meant to be humane, drove men insane.

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

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

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

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

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

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.