Pittsburgh's literal underground railroad.

According to local myth this cemetery is half evil spirits, half good—split down the middle.

Penn State's giant bug collection.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

This jail which was in service for over a century is now open for curious visitors.

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

Behold the rickety wooden glory of the world's oldest operating roller coaster.

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

This recreation of a 19th-century dime museum is full of oddities.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

The Home and murder site of the witch of Rehmeyers Hollow.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

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

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

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 museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

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

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

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

This church in Pittsburgh is home to the largest collection of religious relics in North America.

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

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