Ключевые слова: 100, american, amerindian, ancient, archaeologic, archaeology, background, beautiful, blue, city, culture, earthen, famous, foot, grass, green, hill, historic, historical, history, illinois, indian, landmark, landscape, louis, mississippi, mound, national, native, natural, nature, old, park, people, period, prehistoric, scenery, scenic, site, sky, society, st, stair, state, step, summer, travel, tree, us, visit,