The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

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

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

A beautiful oddities shop crammed with strange and morbid curiosities.

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

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.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A toxic ghost town sitting atop a massive coal fire.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

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

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

These medicine cabinet staples are part of the museum's collection of everyday objects.

The singer, actor, and activist lived here during his final years, and now it’s a museum dedicated to his legacy.

A curious building honoring past and current members of a historic musical comedy troupe.

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

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

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

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

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

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.