Devils Tower National MonumentThe tower is actually the core of an ancient volcano, rising over 500 feet into the air, with an aspect of columns given by hardened cooled magma.
Grand Teton National ParkGrand Teton National Park is noted for its stunning mountain vistas, its shimmering alpine lakes and its abundant wildlife.
Grand Canyon of YellowstoneThe first large canyon on the Yellowstone River, 900 feet deep (275 m) and a half mile (0.8 km) wide.
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