National preserve, southwestern New Mexico, U.S. Located in the Gila National Forest near the headwaters of the Gila River, it contains groups of small but well-preserved Pueblo Indian dwellings in natural cavities of an overhanging cliff 150 ft (45 m) high. The dwellings were inhabited circa AD 100–1300. Established in 1907, the monument occupies 533 acres (216 hectares).
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