Ключевые слова: adventure, america, bacteria, blue, boiling, clouds, discover, down, environment, excelsior geyser crater, explore, famous, geothermal, hill, hot, minerals, mountain, natural, nature, orange, outdoor, outside, overflow, place, river, runoff, rust, sightseeing, sky, steam, tourism, travel, trees, united states, visit, volcanic, water, wyoming, yellowstone national park,