Aztec Ruins National Monument

Aztec Ruins National Monument preserves structures and artifacts of Ancestral Pueblo people from the 1100's through 1200s. People associated with Chaco Canyon to the south built and used the structures, then people related to the Mesa Verde region to the north used the site in the 1200's. The monument was established in 1923, and designated a World Heritage Site in 1987. Acreage: 319.47