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U.S. President Theodore Roosevelt proclaims Devils Tower in Wyoming as the nation's first National Monument.
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Devils Tower
Flat-topped volcanic plug in Wyoming, US
Devils Tower is a butte, laccolithic, composed of igneous rock in the Bear Lodge Ranger District of the Black Hills, near Hulett and Sundance in Crook County, northeastern Wyoming, above the Belle Fourche River. It rises 1,267 feet (386 m) above the Belle Fourche River, standing…Source: Wikipedia (CC BY-SA)