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

A ruined hotel with an unlucky history and an eerie present.

Abandoned hotel with adjacent lake and golf course.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

The remains of a hospital ravaged by fire, once a progressive place of innovations for disabled children.

Unicorns, elephants, and bears, oh my!

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

The hill that gave the Massachusett tribe, and later the state, its name.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

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

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

Remnants of a storybook amusement park hidden behind a strip mall.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

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

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