National Parks and Monuments
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
Collections:
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...preserves and a coral reef. Arches NP E Utah 1929 76,519 (30,979) Giant arches formed...park in 1971. Badlands NP SW S.Dak. 1929 242,756 (98,316) Gullies, ridges...Grand Canyon . Grand Teton NP NW Wyo. 1929 309,993 (125,503) Scenic portion...