opal spring, midway geyser basin, yellowstone national park, wyoming, usa

algae america american azure basin beautiful blue brilliant clear color colorful colour colourful colours contrast create deep deposits environment excelsior flowing fog forest geothermal geyser geyserite hill hot ice landscape midway national natural nature north of opal orange outdoor outdoors park plateau pool rising rocks runoff spring springs states steam thrive travel travertine turquois united usa volcanic water waters west western white wyoming yellowstone