Ключевые слова: abyss, american, bacteria, basin, bison, blue, buffalo, caldera, canyon, castle, colorful, eruptions, falls, flowing, geothermal, geyser, geysers, glory, grand, green, herd, hot, landscape, lower, mammoth, midway, morning, mountains, national, orange, park, pool, pools, prismatic, river, spring, springs, states, steam, thumb, travel, united, upper, volcano, west, wildlife, wyoming, yellow, yellowstone,