This is a 10 minute video excerpt from 500 Nations documentary on the Anasazi and Chaco Canyon. The astronomical alignments are remarkable – you have to experience them to appreciate the complexity of these formations. One of the best overviews of the site can be found here: www.traditionsofthesun.org. Please take a moment to view this incredible explanation of Chaco. A while back Robert Redford narrated a detailed PBS special called The Mystery of Chaco Canyon that I highly recommend.