Example image of eyePlorer eyePlorer map for 'Iowa': Heartland Midwestern United States U.S. state United States Europe Indigenous peoples of the Americas Iowa tribe French colonial empire New France Grain Belt Louisiana Purchase Des Moines, Iowa List of capitals in the United States Big Sioux River Mississippi River Missouri River Des Moines River Honey War Missouri County County seat Lee County, Iowa Polk County, Iowa Cretaceous Cambrian Glacier Landform River Soil Topography Loess Driftless Area East Okoboji Lake Iowa Great Lakes Spirit Lake (Iowa) West Okoboji Lake Coralville Lake Lake Red Rock (Des Moines River) Saylorville Lake Barringer Slough Savanna Tallgrass prairie Bald Eagle Discus macclintocki Indiana bat Least Tern Mussel Piping Plover Shiner (fish) Sturgeon