Back in the 1800's the majority of Pennsylvania was covered in farmlands. During this time period stonewalls were used to mark the property boundaries around farm fields. Having properties that spanned a large distance, settlers in this region would get their families and neighbors to place rocks along to property lines to prevent confusion about the land they owned.
Today, some of these stone walls can still be found around Lacawac. While much of Lacawac has historically been forested some regions, particularly around the Broun Trail, were once farmland. Here you can see the remnants of an old stone wall.
Take a moment to imagine the landscape as vast farmlands and where you are now standing would have been an apple orchard.