This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

Toxic waste disaster that founded the Superfund program.

Quite possibly the last cross all humans will ever see.

A quirky collection of outsider art made from automobile parts.

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

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

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

The only statue of its kind to commemorate Washington's beginnings as an officer of the British Colonial Militia.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

Where the oil industry began.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

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

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

The site of America's first commercial oil well essentially disappeared after the town went bust.

A collection of full-size movie monsters opened to the public.