This web page provides a quick'n easy overview of archeological sites in the southwestern states of New Mexico, Colorado, Arizona and Utah. A handy index by state of all archeological parks provides a range of information.
Some listings offer basic tourist facts for a park or monument.
Also on the page is a link to a brief overview of the prehistoric native cultures found in the region. There is a link to a 1996 NY Times article by George Johnson on theories for the abandonment of sites by the Anasazi. The site was produced by Greg Bondar, who is a PhD Anthropology candidate at Penn. It appears that it was last updated August, 1998. Despite this, the site offers an accessible catalog of sites and links for further study.