Chaco Canyon Acoma and Zuni Publos April 2019

Chaco Culture National Historical Park is a UNESCO World Heritage Site located in the arid and sparsely populated Four Corners region.

The site are considered sacred ancestral homelands by the Hopi and Pueblo people, who maintain oral accounts of their historical migration
from Chaco and their spiritual relationship to the land. Although park preservation efforts can conflict with native religious beliefs,
tribal representatives work closely with the National Park Service to share their knowledge and respect the heritage of the Chacoan
culture. is a United States National Historical Park in the American Southwest.

The park is located in  a remote canyon cut by the Chaco Wash contains the most sweeping collection of ancient ruins north of Mexico,
the park preserves one of the most important pre-Columbian cultural and historical areas in the United States. 

Between AD 900 and 1150, Chaco Canyon was a major center of culture for the Ancestral Puebloans. Chacoans quarried sandstone blocks
and hauled timber from great distances, assembling fifteen major complexes that remained the largest buildings ever built in North
America until the 19th century. Evidence of archaeoastronomy at Chaco has been proposed, with the "Sun Dagger" petroglyph at Fajada
Butte a popular example. Many Chacoan buildings may have been aligned to capture the solar and lunar cycles, requiring generations
of astronomical observations and centuries of skilfully coordinated construction. Climate change is thought to have led to the emigration
of Chacoans and the eventual abandonment of the canyon, beginning with a fifty-year drought commencing in 1130.