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

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

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

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

Dr Barnes' $25 billion private collection of art and arboretum.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

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

In which a local geological marvel becomes a quaint roadside attraction.

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

This might just be the TARDIS of bookstores.

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

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

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

A park full of outsider art, created by college students studying outsider art.

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

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

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

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

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

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

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