Sand dunes, Great Sand Dunes National Park and Preserve, Colorado, United States of America, North America

travel destination photography vertical sand dunes great sand dunes national park and preserve colorado landscape scenics non urban scene day sand shadow nobody horizon over land clear sky blue physical geography brown national park dry arid extreme terrain rolling landscape outdoors usa us united states united states of america north america american north american colour image colour color image color outside travel destinations travel horizon horizons no one no one topography scenery scenic scene scenes landscapes