Ключевые слова: active, adventure, attraction, bacteria, basin, blue, calcium, caldera, carbonate, colorful, deep, destination, emerald, fossil, geology, geothermal, hot, landmark, mineral, national, natural, np, orange, palette, park, pattern, pool, preserve, rock, scenery, scenic, sedimentary, states, sulphur, thermal, touristic, travel, travertine, united, us, valley, volcanic, volcano, water, white, wonder, wyoming, yellow, yellowstone,