spring in yellowstone: steam from grand prismatic spring obscures midway bluff in the excelsior group of midway geyser basin

background basin blue bluff caldera clouds day environment excelsior feature forest geology geothermal geyser grand grass gravel green group hill horizon hot hydrothermal landscape late midway national natural nature nps obscures orange outdoor panorama park pool prismatic scenery scenic sky spring steam thermal tourism travel trees vapor view volcano water white wyoming yellowstone