DescriptionSerpent Mound Crater.jpg English: Serpent Mound Crater aerial photograph. Erosion and glacial activity have largely removed surface traces however...
Great Serpent Mound is a 1,348-foot (411 m)-long,[2] three-foot-high prehistoric effigy mound located on a plateau of the Serpent Mound crater along Ohio...
DescriptionSerpent Mound crater 1974 1VDHV00040075.jpg English: Air photo of the Serpent Mound crater, with red oval showing the approximate perimeter...
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