In the United States, Maryland has no natural lakes. The lakes within the state are all artificially made, often resulting from river embankments and dams.
Maryland is located in the eastern region of the U.S., bordering Pennsylvania, Virginia, West Virginia and Delaware. The Chesapeake Bay divides Maryland into the East Shore and West Shore regions. In the area between the Allegheny Mountains and Eastern Shore lie more than 100 manmade lakes. Some of these lakes include Deep Creek Lake, Lake Waterford, Lake Habeeb, Greenbrier Lake and Lake Linganore. Geologists believe that Buckel's Bog near the Casselman River was once a natural lake during the late Pleistocene Epoch.