Mysterious rocks that ring musically when struck.

Featuring the largest CinemaScope screen in Pennsylvania, this drive-in has entertained moviegoers for more than half a century.

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

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

A park in a small Pennsylvania town is home to an original sculpture by one of its native sons, legendary artist and activist Keith Haring.

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

One of the first commercially successful anthracite-powered iron-making operations in North America.