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

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

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.

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

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

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

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

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

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

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

This little museum in the town where zombies were born celebrates the living dead.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

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

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

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

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

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

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.