Ключевые слова: america, basin, blue, colorful, ecology, environment, geology, geothermal, geyser, heat, hot, lake, land, landscape, national, natural, nature, outdoors, outside, park, pool, scene, scenery, scenic, spring, states, steam, steaming, thermal, thumb, travel, united, usa, view, volcano, water, west, wilderness, wildlife, wyoming, yellowstone,