At one time Ohio had the largest concentration of prehistoric earthworks on the planet. While sadly most of these structures have been lost over time to human intrusion, a number do still remain in this state. This book shows excellent photographs and diagrams of most of the more well-known and interesting sites. Here you will find the Newark mound groups, Fort Ancient, Serpent Mound, and details on the Adena, Hopewell, and other peoples who erected these impressive monuments to collective effort. Not only are the mounds studied here, directions are provided to make day-trips to these locations possible. An approachable starting point for learning about Ohio's amazing pre-Columbian past.