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

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

In the early 1800s, surgery was also a show.

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

This might just be the TARDIS of bookstores.

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

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

Huge masonic hall in Philadelphia with lavishly themed rooms.

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

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

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

An abandoned stretch of highway, deteriorating next to the operational one.

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

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

A layered tribute to the work of mosaicist Isaiah Zagar.

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.

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

A 16th-century horror show built in a lovely Italian garden.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

An alchemist's "magic door" stands in the middle of a Roman park.

A submerged archeological park still holds the wonders of a Roman Sodom.