A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

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

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

This mouldering abandoned mental hospital was once a center for progressive healing.

This small, hidden cove is home to abandoned boats.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

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

A recently abandoned psych ward at the end of Sanatorium Road.

A rock maze opens up to a panoramic viewpoint at an abandoned mine full of ghost stories.

The graffitied ruins stand hidden within the Pennsylvania woods.

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

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

A field of nothing but boulders which resembles a giant's gravel driveway.

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

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

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

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.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

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

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

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

A toxic ghost town sitting atop a massive coal fire.

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