an Entity references as follows:
Wissahickon Valley Park is a large urban park in Northwest Philadelphia, Pennsylvania. It protects 2,042 acres (8.26 km2) of woodland surrounding the Wissahickon Creek between the Montgomery County border and the Schuylkill River. For several miles, the creek winds through a dramatic wooded gorge known as the Wissahickon Valley, a National Natural Landmark.