Ключевые слова: active, algae, america, bacteria, basin, beauty, blue, boiling, caldera, clear, deep, ecosystem, emerald, eruption, famous, geothermal, geyser, glory, green, heat, holiday, hot, lake, landmark, landscape, mineral, morning, national, nature, orange, outdoors, park, pool, prismatic, rainbow, sapphire, scenic, spring, states, steam, thermal, travel, united, usa, volcano, water, wonder, wyoming, yellow, yellowstone,