Travertine terraces in Mammoth hot springs terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

travel destination travel destinations travel photography colour colour image color color image horizontal horizontal image outdoors outside day nobody no one no one travertine terrace mammoth hot springs terraces 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 non urban scene geology geological rock mineral geothermal white colour colour stone step terrace travertine national park steam mist water puddle pool texture