I had a seriously cool book when I was a kid about a boy from one of the Southwestern tribes (I thought it was Navajo, but could easily be Hopi) who journeyed through different underworlds. It was magnificently illustrated, definitely a short children's book and I'd love to find it again, but can't remember the name. Does this ring a bell with anyone?
I'm pretty certain now it was Hopi, because the boy traveled down a series of ladders to each level, and I think it was 4 levels. By the end of the story, when he reached the surface again, he was wearing a very colorful headdress, much like the kachina (I think it was a coming of age story).
Google hasn't been much help, but if anyone remember this book, please let me know! It was so beautiful! Just for frame of reference, I would have been reading it in the late 80's/early 90's.