This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

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.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

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

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

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

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