Ключевые слова: algae, america, area, bacterium, blue, boiling, brackish, dragon, eerie, environment, flowing, geology, geothermal, geyser, grass, green, heat, hot, idaho, microorganism, mineral, mountains, mouth, mud, national, nature, orange, outdoors, park, pools, reserve, rock, rocky, scary, sky, spring, states, steam, surface, tree, unique, united, usa, valley, volcano, water, wild, wildlife, wyoming, yellowstone,