Ключевые слова: acid, bacteria, basin, bison, black 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, orange, outdoors, park, pine, range, river, spring, subalpine, supervolcano, thermophile, tourism, tourist, tree, united states, usa, volcanic, volcano, west thumb, wildlife, wyoming, yellow, yellowstone,