erupting geyser, Yellowstone national park, Wyoming, USA

america idaho montana north usa wyoming yellowstone active american countryside erupting exterior famous fountain fountains geologic geological geologically geology geothermal geothermic geyser geysers heritage hot jet known landscape landscapes national nature outdoor outdoors outside park photo pool reserve scenery scenic sediments seeing sight source sources splash splashes splashing steam steaming structure thermal vapor vapour warm water well known worth