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

There aren't too many operational funiculars around, but Pittsburgh has two!

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

Yo, Adrian!

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

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

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

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

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

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

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

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

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

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

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

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

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

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

Mysterious rocks that ring musically when struck.

It would take 35 firetrucks to fill this enormous glacial pothole.

Pennsylvanian mass grave and possibly mass murder.

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

The final resting place of the Hollywood star who came to a tragic end.

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