steam and water percolating from the giant geyser in the upper geyser basin along the continental divide trail in yellowstone

basin boiling caldera cloud cone continental crater destination divide ecology environment erupting eruption faithful firehole flowing fumes geologic geology geothermal geyser giant heat hot landmark landscape mineral mound national natural nature old outdoors park river rock scenic sky spouting spring states steam steaming thermal trail travel united upper usa vacation vapor volcanic volcano water wild wilderness wyoming yellowstone