This on-line physical geography textbook is an outgrowth of "Natural Landscapes of the United States," 5th Ed. by James Henry and Joann Mossa (Kendall/Hunt, 1995). The text has been rewritten and new illustrations incorporate geospatial data obtained from NASA, the National Atlas of the U.S., and U.S. Geological Survey web sites. As of March 2008 the text covers only the eastern U.S.