Tourists watching the Old Faithful Geyser, Yellowstone National Park
North AmericaUSAWyomingYellowstone National ParkUS National Park Servicenational parkUNESCOWorld Heritage SiteYellowstone CalderaYellowstone LakeOld Faithful GeyserSouth Central Rockies forestGreater Yellowstone Ecosystemnaturelandmarktourist attractionMammoth Hot SpringsGrand Canyon