Ключевые слова: active, active volcano, america, angling, basin, brian welker, caldera, ecosystem, firehole, firehole river, fishing, fly fishing, forest, geology, geothermal, gestalt imagery, geyser, hot, landmark, landscape, lindsay mccoy, montana, mountains, national, national park, nature, outdoor, park, pool, rapids, red, river, rocky, scenic, spring, steam, steam vents, supervolcano, tourism, travel, usa, vents, volcano, water, wyoming, yellowstone, yellowstone caldera, yellowstone national park,