The Commonwealth of Pennsylvania is a state located in the Middle Atlantic region of the United States of America. Pennsylvania has also been known as the Keystone State since 1802, based in part upon its central location among the original Thirteen Colonies forming the United States.
Philadelphia, Pennsylvania draws tourists to see the Liberty Bell, Independence Hall, the Franklin Institute and the steps of the Philadelphia Museum of Art, while The Poconos attract honeymooners, golfers and fishermen, and the Delaware Water Gap and Allegheny National Forest appeal to boaters, hikers, and nature lovers.
The Pennsylvania Dutch region in south-central Pennsylvania is a favorite for sightseers. The Pennsylvania Dutch, including the Old Order Amish, the Old Order Mennonites and at least 35 other sects, are common in the rural areas around the cities of Lancaster, York, and Harrisburg, with smaller numbers extending northeast to the Lehigh Valley and up the Susquehanna River valley.
There is some confusion about the number of "towns" in Pennsylvania. In 1870, Bloomsburg, the county seat of Columbia County was incorporated as a town, and is recognized by state government publications as "the only incorporated town" in Pennsylvania. However, in 1975, McCandless Township, in Allegheny County adopted a home rule charter under the name "Town of McCandless".
The ten most populated cities in Pennsylvania, in order are: Philadelphia, Pittsburgh, Allentown, Erie, Reading, Scranton, Bethlehem, Lancaster, Altoona, and Harrisburg.