Devil's Thumb, Mammoth Hot Springs, 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 vertical vertical image outdoors outside day nobody no one no one devil’s thumb mammoth hot springs 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 spring water solidified calcium carbonate geology geological geothermal national park landmark landmarks famous well known well known non urban scene scenics scenic scene scenes scenery tourist destination mineral mineral formation blue sky clear sky