ocr: Aerial View ofSerpent Mound About the Serpent Mound The Serpent Mound in Ohia is one of the most impressive prehistoric structures in the world.Shaped like a snake, the mound has seven deep curves. It rises to a height of 4 feet (1.2 m) and extends over one quarter mile (4 km). The serpent figure may have had religious or spiritual meaning for the people who built the mound, but historians do not know for sure. Researchers continue to investigate the mound's mysterious origins.
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