Similar to Norse mythology, the Mississippian Native Americans held a cosmological belief system that involved a World Tree.
Their World Tree was a central element of their belief system, and it was believed to be a conduit between the upper and lower worlds. The tree was considered to be the axis of the world, and its roots were believed to connect the earthly plane to the underworld, while its branches extended to the heavens.
Interestingly, the Mississippian World Tree was often depicted with a serpent coiled around its trunk, which is a motif found in many other world mythologies. This serpent symbolized the cycle of death and rebirth, which was an important aspect of the Mississippian worldview.