The mounds preserved here are considered sacred by many Americans, especially the Monument's 20 culturally associated American Indian tribes. A visit offers opportunities to contemplate the meanings of the mounds and the people who built them. The 200 plus American Indian mounds are located in one of the most picturesque sections of the Upper Mississippi River Valley.
For more information about visiting Effigy mounds National Monument. follow this link-
http://www.nps.gov/efmo/index.htm
Effigy Mounds National Monument preserves more than 200 prehistoric mounds built by Native Americans. Including numerous effigy mounds shaped like animals and its natural features consist of forests tall grass prairies, and rivers. It is located in Allanakee County and Clayton County, Iowa in the midwestern United States. It is known for being the "Driftless Area", an area of North America that escaped glaciation during the last ice age.