To truly appreciate Detroit's landmark skyscraper, you have to step inside.

An abandoned, rusty old relic of railroad history stands at attention over the Cuyahoga River.

This icon of the Atomic Age now lays dormant.

This secluded walking trail is a hidden gem of a Pittsburgh park.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

The abandoned coal loading dock is a canvas for unsanctioned art.

Pennsylvania's own Roswell-style UFO mystery.

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

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

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

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.

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

The world’s first penitentiary, meant to be humane, drove men insane.

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

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

This bright yellow relic is the final survivor of a short burst of seashell-shaped petrol pumps.

Constructed from the ruins of a former glass factory, this park incorporates the old with the new.

This park pays homage to the region's rich industrial history of brick making.

Rows of 19th-century brick ovens used to process coal into coke form the center of a wooded park.

Learn about the history and craftsmanship of carousels inside this museum located in a former post office.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

This massive airship factory is so large that it has its own indoor weather.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

An old church full of restored Catholic statues is a makeup artist's labor of love.