Effigy Mounds National Monument
151 Highway 76
Harpers Ferry, IA 52146-7519

Phone: 563-873-3491

The monument preserves 206 prehistoric American Indian mound sites built along the Mississippi River between 450 B.C. and A.D. 1300, including 31 effigy mounds in the shapes of birds and bears. These mounds are outstanding examples of a significant phase of mound-building culture. The monument also protects wildlife and other natural features of the area.