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Steamboat Mountain at sunset from Locust Point, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Grizzly bear (Ursus arctos horribilis), Glacier National Park, Montana, United States of America, North America
Bull elk (Cervus canadensis) in velvet running, Yellowstone National Park, Wyoming, United States of America, North America
Golden evening sunshine illuminates El Capitan and Half Dome in Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Giant Sequoia (Sequoiadendron giganteum) in a sunlit woodland, Mariposa Grove, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Flooded Cook's Meadow beneath Yosemite Falls, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Redwood National State Park, UNESCO World Heritage Site, California, United States of America, North America
Adult black-legged kittiwakes (Rissa tridactyla), South Marble Islands, Glacier Bay National Park, Alaska, United States of America, North America
T. A. Moulton Barn, Mormon Row, Grand Teton National Park, Wyoming, United States of America, North America
The Fairweather Range reflected in calm water, Fern Harbour, Glacier Bay National Park, Alaska, United States of America
Colorado River, Canyonlands National Park, Utah, United States of America, North America
Valley View with El Capitan, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Moss-covered tree trunks in the rainforest, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America
Wall of Windows lit by early morning sun, silhouetted rock, Peekaboo Loop Trail, Bryce Canyon National Park, Utah, United States of America, North America
Tourists watching Old Faithful Geyser, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
View down Zion Canyon from trail to Angels Landing at dawn, Zion National Park, Utah, United States of America, North America
Freezing mists, dawn, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Female tourist on boardwalk by the Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Copy of The Declaration of Independence in Free Quarker Meeting House, Independence National Historical Park, Philadelphia, Pennsylvania, United States of America, North America
Red Fox (Vulpes vulpes) (Vulpes fulva) vixen and two kits, Yellowstone National Park, Wyoming, United States of America, North America
Bighorn sheep (Ovis canadensis) ram eating in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Red Fox (Vulpes vulpes) (Vulpes fulva) in the snow, Grand Teton National Park, Wyoming, United States of America, North America
Red leaves on a big tooth maple (Acer grandidentatum) in the fall, Zion National Park, Utah, United States of America, North America
Mesa Verde National Park, Cliff Palace, UNESCO World Heritage Site, Colorado, United States of America, North America
Mesa Verde National Park, Fire Temple, UNESCO World Heritage Site, Colorado, United States of America, North America
Mesa Verde National Park, Spruce Tree House, UNESCO World Heritage Site, Colorado, United States of America, North America
Chaco Culture National Historic Park, World Heritage Site, Pueblo Bonito, kiva (foreground), UNESCO World Heritage Site, New Mexico, United States of America, North America
Yellow pine chipmunk (Eutamias amoenus) eating sagebrush leaves, Yellowstone National Park, Wyoming, United States of America, North America
Acadia National Park, Mount Desert Island, Maine, New England, United States of America, North America
Sandstone formations, Capitol Reef National Park, Utah, United States of America, North America
The Castle and Highway 24, Capitol Reef National Park, Utah, United States of America, North America
Grand View Point overlook and juniper tree, Island in the Sky, Canyonlands National Park, Utah, United States of America, North America
Grizzly bear (Ursus arctos horribilis) sow and yearling cub, Glacier National Park, Montana, United States of America, North America
Salamander, Sequoia National Park, California, United States of America, North America
Young bison (Bison bison), Yellowstone National Park, Wyoming, United States of America, North America
Black bear (Ursus americanus) sow and cub-of-the-year coming down from a tree, Yellowstone National Park, Wyoming, United States of America, North America
Blacktail prairie dog (Cynomys ludovicianus), Theodore Roosevelt National Park, North Dakota, United States of America, North America
Lake Helen and Mount Lassen, 3187 meters, in the background, Lassen Volcanic National Park, California, United States of America, North America
Old barn dating from approx 1890s, west of Glacier National Park, Montana, United States of America, North America
Tenaya Lake in Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Giant redwood (sequioa) trees in Redwood National Park, Northern California, United States of America, North America
Sunset at Cape Royal, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Black tarmac road, Death Valley National Park, California, United States of America, North America
Black bear (Ursus americanus), outside Glacier National Park, Montana, United States of America, North America
Bridalveil Fall, Yosemite National Park, California, USA, North America
Figure shows scale of the trunk of giant sequoia tree in the Giant Forest, Sequoia National Park, California, United States of America (U.S.A.), North America
View from Schwabacher's Landing across the Snake River to the Teton Range, Grand Teton National Park, Wyoming, United States of America, North America
Hiking the Angel's Landing Trail in Zion National Park, Utah, United States of America, North America
Bryce Canyon National Park, Utah, United States of America, North America
Cliffs and hoodoos lit by late afternoon sun in winter, Paria View, Bryce Canyon National Park, Utah, United States of America, North America
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Rainbow cast by eruption of Riverside Geyser, Firehole River, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Black Canyon of the Gunnison National Park, Gunnison River deep in the canyon, Colorado, United States of America, North America
Black Bear (Ursus americanus) cub of the year climbing a tree, Yellowstone National Park, Wyoming, United States of America, North America
Male Mountain Bluebird (Sialia currucoides) with food at the nest, Yellowstone National Park, Wyoming, United States of America, North America
Grizzly Bear (Ursus arctos horribilis), Yellowstone National Park, Wyoming, United States of America, North America
Coyote (Canis latrans), Yellowstone National Park, Wyoming, United States of America, North America
Cinnamon Black Bear (Ursus americanus) yearling cub climbing a tree, Yellowstone National Park, Wyoming, United States of America, North America
Great gray owl (great grey owl) (Strix nebulosa) chicks, one 25 and one between 22 and 24 days old, Yellowstone National Park, Wyoming, United States of America, North America
Black bear (Ursus americanus) cub of the year or spring cub in a tree, Yellowstone National Park, Wyoming, United States of America, North America
Mesa Verde National Park, Cliff Palace, UNESCO World Heritage Site, Colorado, United States of America, North America
Chaco Culture National Historic Park, World Heritage Site, Fajada Butte, UNESCO World Heritage Site, New Mexico, United States of America, North America
Cinnamon black bear (Ursus americanus), Yellowstone National Park, Wyoming, United States of America, North America
Grizzly bear (Ursus arctos horribilis), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grand Canyon viewed from South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Fog mingling with evergreen trees, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Female Williamson's sapsucker (Sphyrapicus thyroideus) at its nest hole, Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison) cows grazing, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Water reflections of the Teton Range, taken from the end of Schwabacker Road, Grand Teton National Park, Wyoming, United States of America, North America
T. A. Moulton Homestead, barn, Mormon Row, Grand Teton National Park, United States of America, North America
Black bear (Ursus americanus) sow and three cubs of the year, Yellowstone National Park, Wyoming, United States of America, North America
Cinnamon black bear (Ursus americanus), Yellowstone National Park, Wyoming, United States of America, North America
Sunset above Half Dome, viewed from Olmsted Point, in autumn, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Dead evergreen tree and sandstone mounds, Zion National Park, Utah, United States of America, North America
Colourful sunrise above Yosemite Valley from Tunnel View, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Black Bear (Ursus americanus), Yellowstone National Park, Wyoming, United States of America, North America
Coyote (Canis latrans), Jasper National Park, UNESCO World Heritage Site, Alberta, Canada, North America
John Moulton Barn, Mormon Row, Grand Teton National Park, Wyoming, United States of America, North America
El Capitan, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
A stone brick museum is dwarfed by giant sequoia trees at Mariposa Grove after fresh snowfall, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Slump Block area in Theodore Roosevelt National Park North Unit, Watford, North Dakota, United States of America, North America
Female Barrow's Goldeneye (Bucephala islandica), Yellowstone National Park, Wyoming, United States of America, North America
Saguaro cacti and barrel cacti in bloom, Saguaro National Park, Rincon Mountain District, Tucson, Arizona, United States of America, North America
Hikers break with Mount Foraker on the left and Mount Crosson on the right, in distance, Denali National Park, Alaska, United States of America, North America
Landscape, Mount Rainier National Park, Washington State, United States of America, North America
Black bear (Ursus americanus) sow and two cinnamon yearling cubs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Bison (Bison bison) bull in the winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Moose (Alces alces) calf on a winter morning, Grand Teton National Park, Wyoming, United States of America, North America
Scree field on the side of a sandstone butte, Capitol Reef National Park, Utah, United States of America, North America
Mesa Verde National Park, Spruce Tree House, UNESCO World Heritage Site, Colorado, United States of America, North America
Chaco Culture National Historic Park, World Heritage Site, Pueblo Bonito, kiva (foreground), UNESCO World Heritage Site, New Mexico, United States of America, North America
Chaco Culture National Historic Park, World Heritage Site, Pueblo Bonito, kiva (foreground), UNESCO World Heritage Site, New Mexico, United States of America, North America
Grizzly bear (Ursus arctos horribilis) sow and three cubs of the year, Yellowstone National Park, Wyoming, United States of America, North America
Photographer shooting the valley floor from Angel's Landing Trail in Zion National Park, Utah, United States of America, North America
Box elder (boxelder maple) (maple ash) (Acer negundo) branch with yellow leaves in the fall, Capitol Reef National Park, Utah, United States of America, North America
View from Cadillac Mountain, Acadia National Park, Mount Desert Island, Maine, New England, United States of America, North America
Grizzly bear (Ursus arctos horribilis) in the rain, Glacier National Park, Montana, United States of America, North America
Barrow's Goldeneye (Bucephala islandica) swimming, Yellowstone National Park, Wyoming, United States of America, North America
Yellow pine chipmunk (Eutamias amoenus), Yellowstone National Park, Wyoming, United States of America, North America
St. Mary Falls, Glacier National Park, Montana, United States of America, North America