The Mystery of Chaco Canyon 1999    star_border 8
Chaco Canyon, located in northwest New Mexico, is perhaps the only site in the world constructed in an elaborate pattern that mirrors the yearly cycle of the sun and the 19-year cycle of the moon. How did an ancient civilization, with no known written language, arrange its buildings into a virtual celestial calendar, spanning an area roughly the size of Ireland?

The Sun Dagger 1983
A documentary about the celestial calendar created by the Anasazi — and rediscovered by artist Anna Soafer, high on a butte in Chaco Canyon, New Mexico — over a thousand years ago.