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Navarre Building on Tremont Street, Denver, Colorado, United States of America, North America
Clouds reflected in a tarn at Stony Pass, San Juan National Forest, Colorado, United States of America, North America
Elephant heads (little red elephants) (Pedicularis groenlandica), San Juan National Forest, Colorado, United States of America, North America
Punta Colorado, Isla San Jose, Gulf of California (Sea of Cortez), Baja California Sur, Mexico, North America
Richardson Ground Squirrel (Citellus richardsoni) eating, Camp Hale, White River National Forest, Colorado, United States of America, North America
Kiva in foreground, Step House Ruin, dates from 626AD to 1226AD, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America
Aspen leaf turning red and orange, Uncompahgre National Forest, Colorado, United States of America, North America
Yellow aspens among evergreens in the fall reflected in a lake, Uncompahgre National Forest, Colorado, United States of America, North America
Clear Lake, San Juan National Forest, Colorado, United States of America, North America
Hazleton Mountain in the winter, San Juan Mountains, Colorado, United States of America, North America
Bare trees in the snow, Uncompahgre National Forest, Colorado, United States of America, North America
Mesa Verde, UNESCO World Heritage Site, Colorado, United States of America, North America
Twin Falls detail, Yankee Boy Basin, Uncompahgre National Forest, Colorado, United States of America, North America
Snow-covered mountains in the spring from Trail Ridge Road, Rocky Mountain National Park, Colorado, United States of America, North America
Yellow and orange aspens among evergreens in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
Civic Center Park and skyline, Denver, Colorado, United States of America, North America
Skyline, Denver, Colorado, United States of America, North America
Pioneer Monument, Denver, Colorado, United States of America, North America
Hoover Dam on the Colorado River forming the border between Arizona and Nevada, United States of America, North America
Red aspen leaf with water drops, near Telluride, Colorado, United States of America, North America
Yellow aspens among evergreens in the fall reflected in a lake, Uncompahgre National Forest, Colorado, United States of America, North America
Skyline, Denver, Colorado, United States of America, North America
Clark's nutcracker (Nucifraga columbiana), Rocky Mountain National Park, Colorado, United States of America, North America
Frisco, Rocky Mountains, Colorado, United States of America, North America
Stream through wildflowers, American Basin, Uncompahgre National Forest, Colorado, United States of America, North America
Clock tower on the Pioneers Museum, Colorado Springs, Colorado, United States of America, North America
Tejon Street, Colorado Springs, Colorado, United States of America, North America
Denver Post Building on Broadway Street, Denver, Colorado, United States of America, North America
View over the Colorado River, Utah, United States of America, North America
Landscape near Cripple Creek, Colorado, United States of America, North America
Golden eagle (Aquila chrysaetos) in the rain, in captivity, Boulder County, Colorado, United States of America, North America
Aspens in fall colors reflected in Crystal Lake, near Ouray, Colorado, United States of America, North America
Muleshoe Bend, Colorado River, Glen Canyon, Arizona, USA, North America
An adult black spiny-tailed iguana (Ctenosaura similis), on the ground on Barro Colorado Island, Panama, Central America
The train driver and engine of the Durango and Silverton passenger steam train, Colorado, United States of America, North America
Narrow gauge steam railway in autumn, Silverton, Colorado, USA, North America
Caldera Colorado, volcanic landscape, Parque Nacional de Timanfaya, Lanzarote, Canary Islands, Spain, Europe
Cliff palace ruins dating from 1200-1300 AD shaded in limestone overhang, Mesa Verde, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America (U.S.A.), North America
Children learning to ski at Snowmass, near Aspen, Colorado, United States of America, North America
Close-up of a greeat horned owl, Bubo Virginiarius, Colorado, United States of America, North America
Rock formation known as Swirls on Colorado Plateau, Arizona, United States of America (U.S.A.), North America
Rock formation known as Swirls on the Colorado Plateau, Arizona, United States of America (U.S.A.), North America
Aspen trunks and fall foliage, near Telluride, Colorado, United States of America, North America
Looking up at bare aspen trunks, near Silver Jack, Uncompahgre National Forest, Colorado, United States of America, North America
Snow-capped Red Mountain reflected in Crystal Lake with fall colors, near Ouray, Colorado, United States of America, North America
The Jerome Hotel, Aspen, Colorado, USA
Aspen grove with early fall colors, Maroon Lake, Colorado, United States of America, North America
Montezuma Valley Outlook, the park contains some of the most elaborte Pueblo dwellings found today, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America
Plateau and canyon country rising 2000 feet above the Grand Valley of the Colorado River, part of the Great Colorado Plateau, Colorado National Monument, Colorado, United States of America, North America
Winding mountain road in plateau and canyon country rising 2000 feet above the Grand Valley of the Colorado River, part of the Great Colorado Plateau, Colorado National Monument, Colorado, United States of America, North America
Pica (Pica pica), Clear Lake, San Juan National Forest, Colorado, United States of America, North America
Adult mantled howler (Alouatta palliata), Barro Colorado Island, Gatun Lake, Panama, Central America
Double-crested cormorant (Phalacrocorax auritus), Sterne Park, Littleton, Colorado, United States of America, North America
Wood duck (Aix sponsa) hen and ducklings swimming, Arapahoe County, Colorado, United States of America, North America
Dall sheep (Ovis dalli) mother and two-day-old lamb in captivity, Denver Zoo, Denver, Colorado, United States of America, North America
Bull elk (Cervus canadensis) standing in a stream, Rocky Mountain National Park, Colorado, United States of America, North America
Maroon Bells with fall colors during a clearing storm in the evening, White River National Forest, Colorado, United States of America, North America
A water catchment in the Coconino National Forest, Sunset Crater National Monument, Arizona, USA
An adult golden-mantled ground squirrel (Callospermophilus lateralis) feeding, Rocky Mountain National Park, Colorado, United States of America, North America
Female Mallard (Anas platyrhynchos) swimming, Sterne Park, Littleton, Colorado, United States of America, North America
Wood Duck (Aix sponsa) drake swimming, Sterne Park, Littleton, Colorado, United States of America, North America
The Colorado River makes a huge S-bend under Deadhorse Point, a famous viewpoint across Canyonlands National Park, near Moab, Utah, United States of America, North America
The Colorado River winds through the sheer cliffs of Marble Canyon, south of the Grand Canyon, Arizona, United States of America, North America
Wood Duck (Aix sponsa) drake swimming, Sterne Park, Littleton, Colorado, United States of America, North America
The Colorado River makes a huge S-bend under Deadhorse Point, a famous viewpoint across Canyonlands National Park, near Moab, Utah, United States of America, North America
Yellow and orange aspen in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
Yellow and orange aspen in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
An area of the Little Colorado River Gorge east of the Grand Canyon, Arizona, Uninted States of America, North America
Canyon country and bend of Colorado River, Dead Horse Point, Dead Horse Point State Park, Utah, United States of America, North America
Bend of Colorado River at Dead Horse Point, Dead Horse Point State Park, Utah, United States of America, North America
Bend of Colorado River at Dead Horse Point at sunrise, Dead Horse Point State Park, Utah, United States of America, North America
Bend of Colorado River at Dead Horse Point at sunrise, Dead Horse Point State Park, Utah, United States of America, North America
Bend of Colorado River at Dead Horse Point at sunrise, Dead Horse Point State Park, Utah, United States of America, North America
Bend of Colorado River at Dead Horse Point at sunrise, Dead Horse Point State Park, Utah, United States of America, North America
Bend of Colorado River at Dead Horse Point at sunrise, Dead Horse Point State Park, Utah, United States of America, North America
Adult crested guan (Penelope purpurascens), Barro Colorado Island, Gatun Lake, Panama, Central America
Swift fox (Vulpes velox) kits nursing, Pawnee National Grassland, Colorado, United States of America, North America
American pika (Ochotona princeps), Mount Evans, Colorado, United States of America, North America
Swift fox (Vulpes velox) kit biting its mother's ear, Pawnee National Grassland, Colorado, United States of America, North America
Pygmy short-horned lizard (Phrynosoma douglasi douglasi), Pawnee National Grassland, Colorado, United States of America, North America
Swift fox (Vulpes velox) kit, Pawnee National Grassland, Colorado, United States of America, North America
Swift fox (Vulpes velox) kit, Pawnee National Grassland, Colorado, United States of America, North America
Two swift fox (Vulpes velox) kits playing, Pawnee National Grassland, Colorado, United States of America, North America
Three mountain goat (Oreamnos americanus) kids, Mount Evans, Colorado, United States of America, North America
Whitetail prairie dog (Cynomys luscurus), Arapaho National Wildlife Refuge, Colorado, United States of America, North America
Two evergreen trees among yellow aspen trees in the fall, White River National Forest, Colorado, United States of America, North America
Yellow aspens and snow-covered mountains, Uncompahgre National Forest, Colorado, United States of America, North America
Sunset at Dowdy Lake, Red Feather Lakes District, Roosevelt National Forest, Colorado, United States of America, North America
Yellow aspens and evergreens in the fall, Grand Mesa-Uncompahgre-Gunnison National Forest, Colorado, United States of America, North America
Female broad-tailed hummingbird (Selasphorus platycercus) in flight, Red Feather Lakes District, Roosevelt National Forest, Colorado, United States of America, North America
Female broad-tailed hummingbird (Selasphorus platycercus) in flight, Red Feather Lakes District, Roosevelt National Forest, Colorado, United States of America, North America
Female broad-tailed hummingbird (Selasphorus platycercus) perched, Routt National Forest, Colorado, United States of America, North America
Maroon Bells with fall color, White River National Forest, Colorado, United States of America, North America
Mountain goat (antelope) in winter coats on Quandary Peak, a mountain above 14000 feet, known as a 14er, Colorado, United States of America, North America
James Flamingo (Phoenicoparrus jamesi), at Laguna Colorado (Red Lake), Eduardo Avaroa Andean National Reserve, Bolivia, South America
Adult Sally Lightfoot crab (Grapsus grapsus) at low tide on Punta Colorado, Isla San Jose, Baja California Sur, Mexico, North America
View from cliff edge over the Colorado River at Horseshoe Bend, dawn, Glen Canyon National Recreation Area, Page, Arizona, United States of America, North America
Glen Canyon Dam on the Colorado River, Lake Powell, Glen Canyon National Recreation Area, Page, Arizona, United States of America, North America
Swift fox (Vulpes velox) adult and kit, Pawnee National Grassland, Colorado, United States of America, North America
Western meadowlark (Sturnella neglecta), Pawnee National Grassland, Colorado, United States of America, North America