While I think the book of Mormon is trash, it's obvious Joseph had influence from the Indian stories of that region. And they talked about huge empires in the US, a huge inland sea (basically all the great lakes and most of the north central US) and use fortifications .

No no, goy. All modern humans came out of Africa. Go visit the (((Smithsonian))) and have some slop at the renovated cafeteria, goy.

There's parts of the grande canyon that you can't go to. There's supposedly a Sphinx, pyramid and other Egyptian artifacts in that area. There's pics floating around but who knows if they are real or not.