late spring in yellowstone national park: clepsydra geyser of the fountain group erupts in lower geyser basin

background basin caldera clepsydra clouds day environment erupt erupting eruption erupts feature forest fountain geology geothermal geyser grand group horizon hot hydrothermal landscape late loop lower mountains national natural nature nps outdoor panorama park pool road scenery scenic sky spring springtime steam thermal tourism travel trees vapor view volcano water wyoming yellowstone