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

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

In which a local geological marvel becomes a quaint roadside attraction.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

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

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

A park full of outsider art, created by college students studying outsider art.

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

"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.

Where America's first doomsday cult awaited the end of the world.

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

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

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

Mysterious rocks that ring musically when struck.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A lush green oasis in the middle of Chicago.

Shop of curiosities with a dinosaur museum tucked in its basement.

Over a thousand feet beneath the Detroit streets is a subterranean metropolis few are allowed to enter.

An abandoned Victorian-era amusement park is rusting away amidst luxury houses.

Symbolic attempt to overcome the issues of life.