Hohokam Pima, << huh HOH kuhm PEE muh, >> National Monument is in south-central Arizona. The area is closed to the public. It includes the remains of Hohokam Indian artwork, homes, irrigation canals, and tools dating from about 300 B.C. to A.D. 1200. After archaeologists completed excavations in the 1960’s, the site was filled in to protect the ruins. Pima Indians, who believe the Hohokam were their ancestors, live in the area today. The United States government established the site as a national monument in 1972. For the area of the Hohokam Pima National Monument, see National Park System (table: National monuments) .