Ключевые слова: active, basin, caldera, carbon, dioxide, eruptions, fumarole, gases, geologic, geology, geothermal, geyser, gorw, grand prismatic, hot, hotspot, hydrogen, hydrothermal, midway, mineral, national park, nature, park, prismatic, pyroclastic, spring, steam, sulfur, superheated, supervolcano, terrain, tour, travel, unique, united states, usa, visit, volcanism, water, wyoming, yellowstone,