 He views Chaco as a ceremonial center and a "place of ritual architecture", which pilgrims from throughout the San Juan Basin's two hundred great house communities would visit.These pilgrims brought large quantities of goods and raw materials to the canyon, including exotics such as turquoise and shell beads, and also ceramics, timber, and food.Neutron activation analysis linked an artifact from Chetro Ketl to the Cerrillos Turquoise Mines, located south of Santa Fe, New Mexico.