Trees on a hillside covered with fog, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

travel destination photography horizontal colour image yellowstone national park unesco world heritage site wyoming united states of america north america fog tree hill outdoors day no people dramatic landscape national park scenics landscape non urban scene physical geography high angle view forest mist atmospheric mood tranquil scene ethereal usa us united states american north american colour color image color outside tourist destination travel nobody no one no one high angle elevated view from above looking down topography scenery scenic scene scenes picturesque misty foggy atmospheric tranquility serene serenity peaceful unesco world heritage sites unesco world heritage site world heritage sites sirius collection