Pink clouds over snow-covered hills at sunset, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

travel destination photography horizontal colour image outdoors unesco world heritage site sunset national park yellowstone national park wyoming united states of america north america landscape non urban scene physical geography scenics tranquil scene beauty in nature majestic dramatic sky mountain dramatic landscape snow cold temperature no people usa us united states american north american colour color image color outside tourist destination travel nobody no one no one topography scenery scenic scene scenes picturesque the natural world tranquility serene serenity peaceful natural beauty unesco world heritage sites unesco world heritage site world heritage sites sundown dusk twilight