The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

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

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Glass and concrete building designed by Albert Kahn.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

This was one of the first (and last) university-built and operated nuclear reactors.

A layered tribute to the work of mosaicist Isaiah Zagar.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

Century-old shop, specializing in Occult products.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

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

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

A rare view of a preserved Victorian science museum.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

This demolished goliath of American industry once loomed over the depressed town it once made thrive.

The first American department store, and home to the largest operating musical instrument in the world.

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

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

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

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

This jail which was in service for over a century is now open for curious visitors.

Mysterious rocks that ring musically when struck.