Some of the mounds at Effigy Mounds in Iowa are huge. The red arrow points to where a person is standing by the head of the Great Bear mound. . . . . #effigymounds #nps #nationalpark #travel #history https://www.instagram.com/p/BoDcVz7lYDe/?utm_source=ig_tumblr_share&igshid=mb60lgyl7hlq











