spring in yellowstone: bijou, catfish, mastiff & giant geysers of the giant geyser complex in upper geyser basin

background basin bijou blue caldera catfish clouds complex cone day environment feature forest geology geothermal geyser geyserite geysers giant grass green group hillside horizon hot hydrothermal landscape mastiff natural nature nps outdoor panorama scenery scenic sky spring steam thermal tourism travel trees upper vapor view volcano water wyoming