An abandoned stretch of highway, deteriorating next to the operational one.

This demolished goliath of American industry once loomed over the depressed town it once made thrive.

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

The graffitied ruins stand hidden within the Pennsylvania woods.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

These lush botanical gardens employ the most purrfect pest control force.

One of the oldest of its kind.

Steepest flood safety railway in the entire world.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

Pennsylvanian mass grave and possibly mass murder.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

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

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

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

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