Ключевые слова: american, beautiful, bison, blue, falls, fire, fog, forest, geological, geothermal, geyser, geysers, hot, idaho, lake, landscape, limestone, magma, montana, national, nature, ocean, old faithful, outdoors, park, pool, rapids, river, rocks, sea, sky, smoke, snake river, spring, steam, stream, sulfur, tectonic, thermal, volcanic, water, waterfall, waterfalls, white, wild life, wilderness, wyoming, yellowstone,