Ключевые слова: black and white, caldera, castle, ecosystem, elk, eruption, famous, features, forest, fumarole, geothermal, geyser, grotto, hike, hiking, hot, hot spring, hydrothermal, idaho, landmark, montana, mount, mountain, national park, national park service, nature, outdoors, park, pine, range, river, rock, steam, subalpine, supervolcano, tourism, tourist, tree, united states, upper geyser basin, usa, volcanic, volcano, water, wildlife, wyoming, yellowstone,