National park, southwestern Colorado, U.S. It was established in 1906 to preserve prehistoric Indian cliff dwellings.
Occupying a high tableland area of 52,085 acres (21,078 hectares), it contains hundreds of pueblo ruins up to 13 centuries old. The most striking are multistoried apartments built under overhanging cliffs. Cliff Palace, the largest, was excavated in 1909 and contains hundreds of rooms, including kivas, the circular ceremonial chambers of the Pueblo Indians .