Effigy Mounds National Monument
National Monument · Harpers Ferry, Iowa
A 2,500-acre monument in northeastern Iowa preserving 206 prehistoric Native American mounds along the bluffs of the Mississippi River. 31 of these are effigy mounds — earthworks shaped like bears, birds, and other animals — built by Indigenous peoples between 750-1400 AD. The monument is sacred to 20 affiliated Native American tribes who consider it a place of ancestral worship.
151 Highway 76, Harpers Ferry, Iowa, 52146, United States
Visitor center: 9 AM - 4:30 PM daily (Mar-Nov), reduced winter hours. Closed Thanksgiving, Christmas, New Year's Day.
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