Here's a question on my mind, which I think I might have a hard time finding the answer to: How far did the knowledge of the Americas of different American Indian groups range? It is clear, for instance, that groups living in what is now the northeastern United States knew the area well up into Canada and down at least as far as Virginia or North Carolina. But did they know anything about Florida? Texas? Where they aware that there was an Aztec civilization somewhere in the far distance? Would they have known of the Arctic regions to the north of them?
Even in the Internet age, This sort of fact can be hard to find, because it's not clear, at least to me, just how to ask for it from a search engine