Before Europeans arrived, a unique American Indian Effigy Mound culture developed in the upper Midwest building thousands of earthen mounds in the shape of animals across the landscape. Today, over two-hundred mounds are preserved intact here; thirty-one are effigies in the shape of bears and birds found along hiking trails offering magnificent views of the Mississippi River. Effigy Mounds National Monument preserves 31 early American Indian earthen mounds in the shape of animals. The monument preserves over 200 mounds representing almost 2000 years of mound building. This pin has our America’s National Park Collectors Series logo for Effigy Mounds National Monument on it. Magnet and Patch measure 3-1/2" H x 2-3/4" W. Pin measures 1-1/8" H x 7/8" W.