Possibly even snakes, although the famed Serpent Mound is not attributed to the Hopewell Culture, even though it is found in the same region of Ohio. Pyramids are from civilizations from long ago.

Ohio is rich with Native American history. Even the state's name is derived from the Iroquois word 'ohiyo', meaning "the great river ... from TourismOhio. The Serpent Mound Historical Site ...