This Native American project focuses on the Effigy Mounds and Ancient Earth Works of indigenous America.What are effigy Mounds?Raised piles of dirt, Effigy Mounds mounds are numerous in the midwestern USA, especially in parts of southern Wisconsin. Some are shaped like cones, some like lines and some like animals. It is estimated there may have been 20, 000 before European contact. Over time, most were destroyed to create farms, cities and roads. However, 4000 are still in existence and there