Every 18.6 years, the moon reaches its northernmost rising point on the horizon. From the vantage point of the Great House, the moon appears to rise directly between Chimney Rock and Companion Rock .
The monument preserves over 200 ancient homes, including pit houses and multi-family dwellings used by the broader population who farmed the valley floor. 3. Archaeoastronomy: Reading the Skies
Protecting ancient masonry from erosion and freeze-thaw cycles.
Chimney Rock is considered a "Chacoan outlier," a satellite community of the vast Chaco Canyon civilization centered in New Mexico, roughly 100 miles to the south. It represents the highest elevation of any known Chacoan site.