 It includes many parks and preserves, including one of Ohio's greatest archeological wonders, the Serpent Mound at the Serpent Mound State Memorial in Locust Grove.Serpent Mound lends its name to the Serpent Mound crater, the eroded remnant of a huge ancient meteorite impact crater.Other areas of note include state parks and national forests like Edge of Appalachia, Shawnee State Park, Adams Lake State Park and Robert H. Whipple State Nature Preserve.