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Castle Mountains National Monument

(Encyclopedia) Castle Mountains National Monument, 20,920 acres (8,466 hectares), SE California. Surrounded on three sides by the Mojave National Preserve (see Mojave Desert), the monument contains…

Joshua Tree National Park

(Encyclopedia) Joshua Tree National Park, 1,022,703 acres (414,050 hectares), S California. Lying between the high Mojave Desert and the low Colorado Desert, this park has a unique ecosystem in which…

Mojave Trails National Monument

(Encyclopedia) Mojave Trails National Monument, 1.6 million acres (647,000 hectares), SE California. Linking Joshua Tree National Park and Mojave National Preserve, it follows the trails of the…

Sand to Snow National Monument

(Encyclopedia) Sand to Snow National Monument, 154,000 acres (62,000 hectares) in the San Bernadino Mountains, S Calif. It rises from the Sonoran Desert floor to Mount San Gorgonio (11,503 ft/3,506 m…

Río Grande del Norte National Monument

(Encyclopedia) Río Grande del Norte National Monument, 242,500 acres (98,140 hectares), N central N.Mex, on the Taos Plateau between the San Juan and Sangre de Cristo mts.; est. 2013. The monument…

Gold Butte National Monument

(Encyclopedia) Gold Butte National Monument, 296,937 acres (90,506 hectares), SE Utah, est. 2016 and managed by the Bureau of Land Management. Named for a mining ghost town, the monument embraces a…

Canyonlands National Park

(Encyclopedia) Canyonlands National Park, 337,598 acres (136,679 hectares), SE Utah; est. 1964. Located in a desert region, the park contains a maze of deep canyons and many unusual features carved…

bighorn

(Encyclopedia) bighorn or Rocky Mountain sheep, wild sheep, Ovis canadensis, of W North America, formerly plentiful in mountains from SW Canada to N Mexico. Indiscriminate hunting, disease, and…

badlands

(Encyclopedia) badlands, area of severe erosion, usually found in semiarid climates and characterized by countless gullies, steep ridges, and sparse vegetation. Badland topography is formed on poorly…

World Heritage Sites in the United States

The United Nations Educational, Scientific, and Cultural Organization (UNESCO) has identified 878 World Heritage sites that it considers of “outstanding universal value.“ In the United States…