What is the size of fort ancient?

Fort Ancient, located in Warren County, Ohio, is an ancient earthwork site that covers approximately 100 acres. It features a series of monumental earthworks, including a massive earthen wall that stretches over 3.5 miles in length. Constructed by indigenous peoples, it is believed to have been built around 100 B.C. to A.D. 500. The site is significant for its archaeological value and its role in understanding prehistoric Native American cultures.