Pennsylvania boasts 20 state forests and one national forest, 116 state parks, one Great Lake (Lake Erie), 50 other natural lakes, 2,500 man-made lakes, along with thousands of miles of rivers and streams. The state is also something of a cultural Mecca: it hosts a number of vital cities, from Pittsburgh to Philadelphia. The city of Philadelphia houses the Liberty Bell and Independence Hall, two major national historical landmarks. The interior of the state has a number of subcultures worth exploring, including the famous Amish countryside, a religious community based in Christian Anabaptist dogma.