Grand Mound

Grand Mound in northern Minnesota is a prehistoric burial site dating to about 200 BCE and the largest surviving prehistoric structure in the upper Midwest. Its main earthwork measures about 140 feet long, 100 feet wide, and 25 feet high, with a narrow tail extending another 200 feet, and four smaller earthworks stand nearby. Archaeological deposits from the Middle Woodland and Late Woodland periods show the area served purposes beyond burial, including within a broader landscape of villages, camps, and fishing places. Reclassified in the 21st century as an effigy mound, possibly shaped like a muskrat, it was designated a National Historic Landmark in 2011.

Littlefork, Minnesota · United States