Ancient Observatories

This website about ancient astronomy features exhibitions on Chaco
Canyon (New Mexico) and Chichén Itzá, the ancient Mayan city that
was located in the Yucatán Peninsula area of Mexico. Features
information and activities on seasons, alignments, petroglyphs,
Mayan mythology, the Mayan calendar, and related topics. Includes
a teacher's guide. From the Exploratorium.