The Hopi Indians, currently settled in northeast Arizona, are the descendants of the Anasazi who in turn are believed to have had links to the Aztecs.
Another site links them to the Maya(b)(c). A number of writers have tried to suggest that the Hopi had an early connection with Atlantis employing a highly subjective interpretation of their traditions and flood myths.
Others have associated the Hopi with UFOs and the supposed disasters that were due in 2012.
There is now a website(a) dedicated to the Hopi and their petroglyphs.