yellowstone national park, morning glory pool, upper geyser basin, wyoming, usa

algae along america american and basin beautiful caldera clear color colorful colour colourful faithful firehole forest geological geology geothermal geyser geyserite glory green hike hiking hot landscape many morning mountains national natural north of old one outdoor outdoors park plateau pool river rocky runoff spring springs states tectonics trail trees united upper usa volcanic volcanism water west western wild wilderness wyoming yellow yellowstone