Cahokia museum is awesome I would say, pyramids so up north, it's something ! And also you see the influence from Mesoamerica in the arts and decoration of Cahokia, not only in its architecture. I would love to go to buy the litle carved board that has a snake skin at the back, possibly a link with the myth of quezatcoalt and Kukulkan. My GF of the time bought it and I'm on her will for that piece lol !!!