Ключевые слова: acid, bacteria, basin, bear, bison, blue bell pool, caldera, ecosystem, elk, features, forest, geothermal, geyser, grizzly, hike, hiking, hot, hot spring, hydrothermal, idaho, lake, landmark, montana, mount, mountain, national park, national park service, nature, outdoors, park, pine, pool, range, river, spring, subalpine, supervolcano, thermophile, tourism, tourist, tree, united states, usa, volcanic, volcano, west thumb, wildlife, wyoming, yellowstone,