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Mesa Arch, Island in the Sky, Canyonlands National Park, Utah, United States of America, North America

Butter-and-eggs (common toadflax) (yellow toadflax) (Linaria vulgaris), San Juan National Forest, Colorado, United States of America, North America

One sided penstemon (sidebells penstemon) (Penstemon secundiflorus), San Juan National Forest, Colorado, United States of America, North America

Mother brown bear and her cub, Sequoia National Park, California, United States of America, North America

Mountain goat (Oreamnos americanus) nanny and kid in the spring, Shoshone National Forest, Wyoming, United States of America, North America

Bull elk (Cervus canadensis) in the snow, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Sunrise from atop a sandstone hill, Grand Staircase-Escalante National Monument, Utah, United States of America, North America

Shane Cabin, Homestead, near Kelly, Grand Teton National Park, Wyoming, United States of America, North America

View from Yavapai Point, in evening light, Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America (U.S.A.), North America

Sunset lights The Watchman, Virgin River overlook in winter, Zion National Park, Utah, United States of America, North America

Teton Range, footbridge and pines with reflections, Bradley Lake, Grand Teton National Park, Wyoming, United States of America, North America

Yellowstone River in winter, 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

Man looking at Mount Rainier from trail, Mount Rainier National Park, Washington State, United States of America, North America

Water, trees, and mountains viewed from the waters of Lake Quinault, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Bison (Bison bison) calf, Yellowstone National Park, Wyoming, United States of America, North America

Male Red-Winged Blackbird (Agelaius phoeniceus), Yellowstone National Park, Wyoming, United States of America, North America

Hiker on the sand dunes, Great Sand Dunes National Park and Preserve, with Sangre Cristo Mountains in the background, Colorado, United States of America, North America

Remains of buildings at Fort Union National Monument, New Mexico, United States of America, North America

Half Dome and Yosemite Valley from Glacier Point, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Tenaya Lake on the Tioga Pass, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Five Faces Pictograph, Anthropomorph images 700 to 1000 years old, Davis Canyon, Canyonlands National Park, Utah, United States of America, North America

A cowboy wrangler leads a pack train of horses up the South Kaibab Trail in Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Johns Hopkins Inlet, Fairweather Range, Glacier Bay National Park and Preserve, Southeast Alaska, United States of America, North America

Orange maples among evergreens, Uinta National Forest, Utah, United States of America, North America

Liberty Cap, a dormant hot spring cone, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Abyss Pool, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Blue Funnel spring, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Dead tree and view of canyon from the South Rim at Hopi Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America (U.S.A.), North America

Grizzly bear (Ursus arctos horribilis) in the rain, Glacier National Park, Montana, United States of America, North America

Hoary marmot (Marmota caligata), Glacier National Park, Montana, 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

Bison (Bison bison) cows sparring, Yellowstone National Park, Wyoming, United States of America, North America

Half Dome and Clouds Rest mountains from Olmsted Point, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

The Three Brothers reflected in the Merced River in Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Bison (Bison bison) bull, Yellowstone National Park, Wyoming, United States of America, North America

Lizard Head in the winter, Uncompahgre National Forest, Colorado, United States of America, North America

Excelsior Geyser Crater, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Coyote (Canis latrans) on the snow in the spring, Yellowstone National Park, Wyoming, United States of America, North America

Hellen Lake with Mount Lassen, 3187 m, in the background, Lassen Volcanic National Park, California, United States of America, North America

Black bear (Ursus americanus) in the snow, Yellowstone National Park, Wyoming, United States of America, North America

Grizzly bear (Ursus arctos horribilis) in the snow in the spring, Yellowstone National Park, Wyoming, United States of America, North America

Black bear (Ursus americanus) in the spring, Yellowstone National Park, Wyoming, United States of America, North America

Half Dome from the Merced River, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Bridalveil Fall in spring Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Tan sandstone at first light, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Emerald Spring in Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Firehole Spring, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Lower Falls, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Sol Duc Falls, Olympic National Park, UNESCO World Heritage Site, Washington state, United States of America, North America

Christine Falls, Mount Rainier National Park, Washington state, United States of America, North America

Grand Geyser erupts and steam blocks the sun, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Bull moose (Alces alces), Roosevelt National Forest, Colorado, United States of America, North America

Wildflowers and mountains near Cinnamon Pass, Uncompahgre National Forest, Colorado, United States of America, North America

Male Audubon's Yellow-Rumped Warbler (Dendroica coronata auduboni), Yellowstone National Park, Wyoming, United States of America, North America

Black Bear (Ursus americanus) sow climbing a tree, Yellowstone National Park, 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

Red fox (Vulpes vulpes) in the snow, Grand Teton National Park, Wyoming, United States of America, North America

Sand dunes in the Great Sand Dunes National Park and Preserve, with Sangre Cristo Mountains in the background, Colorado, United States of America, North America

The Teton Range at dawn after a fresh snow, Grand Teton National Park, Wyoming, United States of America, North America

Salmon-coloured sandstone wall with evergreens, Grand Staircase-Escalante National Monument, Utah, United States of America, North America

Red leaves on a big tooth maple (Acer grandidentatum) near a Ponderosa pine (Pinus ponderosa) trunk in the fall, Zion National Park, Utah, United States of America, North America

The enormous face of El Capitan towering above Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Sunrise over El Capitan and Yosemite Valley from Tunnel View, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Majestic view of Yosemite Valley from Tunnel View, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Sunset at Locust Point, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Fremont Indian petroglyphs in Capitol Reef National Park, Utah, United States of America, North America

The Spectacles (North and South Windows), Arches National Park, Moab, Utah, United States of America, North America

Barn, Thomas Alma and Lucille Moulton Homestead, Mormon Row Historic District, Grand Teton National Park, Wyoming, United States of America, North America

Snake River at the Schwabacher Landing, Grand Teton National Park, Wyoming, United States of America, North America

Mesa Arch sunrise, Island in the Sky, Canyonlands National Park, Utah, United States of America, North America

El Capitan reflected in the Merced River in Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Beaver (Castor canadensis) eating an evergreen branch, Yellowstone National Park, Wyoming, United States of America, North America

Hooded Oriole (Icterus cucullatus), Chiricahuas, Coronado National Forest, Arizona, United States of America, North America

Sunset through Cyclops' Skull Arch, Alabama Hills, Inyo National Forest, California, United States of America, North America

The Narrows of the Virgin River in the fall, Zion National Park, Utah, United States of America, North America

Grizzly Bear (Ursus arctos horribilis), Yellowstone National Park, Wyoming, United States of America, North America

Blue holes and white crystals, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Black bear (Ursus americanus), outside Glacier National Park, Montana, United States of America, North America

Low tide, Cabrillo National Monument, Point Loma, San Diego, California, United States of America, North America

Low tide, Cabrillo National Monument, Point Loma, San Diego, California, United States of America, North America

Crested Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Excelsior Pool, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

El Capitan and Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Memorial to General George Custer at the Little Bighorn Battlefiled National Monument, Montana, United States of America, North America

Male Yellow-Headed Blackbird (Xanthocephalus xanthocephalus), Yellowstone National Park, Wyoming, United States of America, North America

American Robin (Turdus migratorius), Yellowstone National Park, Wyoming, United States of America, North America