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