Ключевые слова: america, basaltic, basin, destination, famous, forest, formations, geological, geology, geyser, geysers, hazards, horizontal, hot, hydrothermal, land, lava, lavas, mammoth, mountains, national, natural, nature, park, place, plateau, rocks, scenery, scenic, smoke, soil, steam, supervolcano, toxic, travel, traveling, travertine, trip, usa, volcanism, volcano, water, wyoming, yellowstone,