Ключевые слова: america, bacteria, balcony, caldera, erupting, eruption, geology, geothermal, geyser, hot, landmark, landscape, mammoth, mineral, minerva, national, natural, nature, orange, park, rock, spring, states, steam, sulfur, supervolcano, terrace, thermal, tourism, travel, united, us, vacation, volcanic, volcano, wyoming, yellowstone,