Greenhouse Park is a social center within The Stonycreek River Corridor. located along PA Route 403 near Tire Hill. Whitewater Park, Pennsylvania’s first set of constructed rapids, is located in the Stonycreek River adjacent to Greenhouse Park. Here in Class II water novice paddlers can learn basic whitewater techniques and more-experienced boaters can play in hydraulics. Tubing and fishing also are popular activities here.