Elevated view of Doublet Pool, Firehole River and Castle Geyser, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

photography colour colour image color color image horizontal horizontal image outdoors outside day nobody no one no one travel destination travel destinations travel geyser doublet pool firehole river castle geyser upper geyser basin yellowstone national park unesco unesco world heritage site world heritage site wyoming usa us united states united states of america north america american north american north america national park scenics scenic scene scenes scenery landmark landmarks famous well known well known hot spring geology geological physical geography topography geography geographical water nature natural natural world tourist destination tourist destinations