 Chetro Ketl lies from Pueblo Bonito, in an area that archeologists call downtown Chaco; they theorize that the area may be an ancestral sacred zone.Chetro Ketl contains architectural elements, such as a colonnade and tower kiva, that appear to reflect a Mesoamerican influence.Chetro Ketl's purpose is widely debated but many archeologists believe the building was a place of large-scale ceremony that held an important position within the larger Chacoan system.