The Serpent Mound Historical Site is the largest effigy mound in the world, about 1,400 feet long. An effigy mound is a giant earthen sculpture used as a shrine to honor the powerful spirit it represe...
The Adena Mound is inside the Indian Mound Reserve, a much bigger park that is managed by Greene County Parks & Trails. The Adena Mound was built approximately 500 B.C. Mounds such as these were u...