From Ohio History Central
→A.D. 1000 to 1650: Adding Topic
There is evidence that the Fort Ancient culture built Serpent Mound in Adams County, Ohio. They also may have built the "Alligator" Mound of Licking County, but that effigy is not likely a sculpture of an alligator. It is more likely an effigy of a panther, opossum, or a salamander.