The Lehigh Valley
Halma, Robert (Cedar Crest College) / Oplinger, Carl S. (Muhlenberg College)
Comprising approximately 730 square miles and more than half a million residents, the Lehigh Valley is the third largest metropolitan area in Pennsylvania, encompassing the cities of Allentown, Bethlehem, and Easton. Much is known about the industrial history of the valley (home to Bethlehem Steel, Mack trucks, and Crayola crayons), but few have discovered the valley's natural history: the "endless" Blue Mountain, the spectacular raptor migrat...