Ключевые слова: acid, america, basin, boiling, corrosion, danger, destination, erosion, famous, fountain, geology, geothermal, geyser, heat, hot, landmark, landscape, limestone, mud, national, nature, orange, outdoors, paint, park, pool, pot, scenic, sky, spring, springs, states, steam, sulfur, summer, thermal, tourism, toxic, trail, travel, trees, united, volcanic, water, wilderness, wonderful, wyoming, yellowstone,