Aztec Ruins National Monument (319 acres/129 ha), San Juan co., NW N.Mex., 14 mi/23 km NE of Farmington, NW of Aztec. Ruins of a sophisticated 12th-cent. Pueblo settlement; has only restored kiva in U.S. Pueblo culture. Misnamed by early Eur. settlers. Est. 1923 by proclamation.