Huge masonic hall in Philadelphia with lavishly themed rooms.

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

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

A beautiful oddities shop crammed with strange and morbid curiosities.

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

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

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

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 rare view of a preserved Victorian science museum.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

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

Mysterious rocks that ring musically when struck.

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

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.

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

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

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

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

All that remains of one of the Civil War's more deadly POW camps is a simple flagstone.

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

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