ARTISTIC PHOTOS Great Sand Dunes National Monument. (Dunes168)Abstract sunset reflection. Alaska (150803-1170965)Water fowl. (Dunes049)Greater sandhill cranes leave night roost as sun rises through fog. Monte Vista National Wildlife Refuge, San Luis Valley, Colorado. (Dunes011)Great Sand Dunes National Monument. (Dunes135)Great Sand Dunes National Monument. (Dunes151)Great Sand Dunes National Park. (Dunes127)Cumulus clouds. (080725-00292)Ducks taking off at sunrise. (Waterfowl141)Great Sand Dunes National Monument. (Dunes164)Abstract sunset reflection in water. Alaska. (140902-6425)Blowing sand, Great Sand Dunes National Park, San Luis Valley. (Dunes030)Coyote tracks and prairie sunflower at Great Sand Dunes National Park, San Luis Valley, Colorado. (Dunes080)Great Sand Dunes National Monument. (Dunes152)Windswept sand of Killpecker Dunes in Wyoming's Red Desert. (RedDesert011)Prairie sunflowers (Helianthus petiolaris) growing at Great Sand Dunes National Monument. (Dunes160)Fall aspen leaves float on top of a calm pool of water. San Luis Valley, Colorado. (Scenic187)American coots landing in water. (WaterFowl049)Lenticular clouds over Devil's Head. (120115-6089)Dunes and reflection. (Scenic360)People hiking in Great Sand Dunes National Park, San Luis Valley, Colorado. (Dunes032)Great Sand Dunes National Monument. (Dunes125)Great Sand Dunes National Park. (Scenic096)Autumn branches. (Dunes114)Water flowing through Great Sand Dunes National Monument. (Dunes159)Aerial of Cotton Lake. Dry wetland on Medano Ranch, Great Sand Dunes National Park, San Luis Valley. (Dunes092)Great Sand Dunes National Park. (Dunes129)Sunset and prairie sunflowers (Helianthus petiolaris), Great Sand Dunes National Park. (Dunes007)Sunflowers growing on sand dunes. (Dunes014)Great Sand Dunes National Park. (Dunes128)Great Sand Dunes National Park. (Dunes131)Great Sand Dunes National Park. (Dunes126)Sunrise over Great Sand Dunes National Park, San Luis Valley. (Dunes012)Wheeler geologic area is formed by erosion of volcanic tuff and ash. San Juan Mountains at the edge of the San Luis Valley. (Dunes025) PHOTO LIBRARY MENUMENUAERIALS / FLORA / SCENICSAMPHIBIANS / REPTILESARTISTIC PHOTOS / PEOPLE / STRUCTURES / TRANSPORTATION Artistic PhotosBuildings / StructuresOutdoor ProfessionalsPeopleTransportation BIRDSBUGS / INSECTS / SPIDERSMAMMALSMARINE LIFEPLACESURBAN WILDLIFE