Explore 8 Midwest National Monuments
Effigy Mounds National Monument
Theories abound as to why effigy mounds were built. No matter the reason, Iowa's effigy mounds were sacred to 12 American Indian tribes. This Harpers Ferry spot preserves three sites featuring 206 prehistoric mounds, 31 shaped as mammals, birds or reptiles. Located in a picturesque section of the Upper Mississippi River Valley, the site offers trails past mounds, wetlands and prairies. Rangers lead hikes to Fire Point and give tool and weapon talks (563/873-3491; nps.gov/efmo).