Effigy Mounds National Monument is located near McGregor, Iowa, less than a mile from the mighty Mississippi River. The monument is a collection of mounds that were part of a culture that transcended individual tribes and is considered to be an archeological treasure providing insight into Native American culture. These mounds were not constructed for burial purposes, as many of the tribes continued to build circular mounds for burial. The Effigy Mounds Culture utilized hills in the shape of animals such as deer, bison, and turtle, among others. Archeologists believe that the mounds may have been created to honor seasonal events, to mark territory or for other purposes, but their actual purpose is still unknown.