The Cahokia site is the largest gathering place of early Indian tribes in North America and is a world cultural heritage. There is a road passing through the area, the north side is the largest mound, which seems to be two floors, and there is a museum on the south side, which fully displays the life of the Indians and unearthed cultural relics, and the exhibition is very high. Next to it are two double mounds, one is square and the other is round. It takes 20 dollars to play Uber from the arch, and the return journey is also convenient. Mound ruins are found in many places in the United States, and here are the largest and most typical.