Ключевые слова: adventure, beautiful, beautiful landscapes, blue sky, colorado, colorado state, desert, dry, dunes, empty, extreme, famous landscape, field, foot print, geology, great sand dune, great sand dunes national park, heat, hikers, hiking, horizontal, hot, hot wave, journey, landscape, mountains, national park, natural, nature, outdoor, pattern, preserve, range, sand background, scenic landscape, scenic view, shadow, sky background, southwest, summer, sunrise, sunset landscape, texture, travel, wind, windy,