morning glory pool hot spring in the upper geyser basin, yellowstone national park, 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 heritage hike hiking hot landscape many morning mountains national natural nature north of old one outdoor outdoors park plateau pool river rocky runoff site spring springs states tectonics trail trees unesco united upper usa volcanic volcanism water west western wild wilderness world wyoming yellow yellowstone