Ключевые слова: backpack, basin, beauty, caldera, camping, canyon, chromatic, deluge, ecosystem, erosion, faithful, falls, forest, geologic, geyser, gorge, hike, hiking, hot spring, hydrothermal, inn, lava, meadow, national, nature, outdoors, park, rapids, ravine, recreation, rhyolite, river, spout, sprite, steam, tourism, travel, upper, vacation, valley, vent, waterfall, wilderness, yellowstone,