The most interesting addition to the list by the Interior Department which recently designated 10 new National Historic Landmarks is not a building at all. Man Mound located in Sauk County, Wisconsin, is the only human-shaped effigy mound left in North America. There are thousands of burial and ceremonial mounds built by indigenous people across the eastern U.S. Most of them are conical mounds. A few, like Serpent Mound in Ohio, are in the shape of animals, which are called effigy mounds. But the Late Woodland culture which lived in southern Wisconsin between 600 and 900 A.D. took mound building to a new height.