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Giant redwood (sequioa) trees in Redwood National Park, Northern California, United States of America, North America

Seasonal pond on Tuolumne Meadows in Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Grizzly Bear (Ursus arctos horribilis) sow and two cubs of the year or spring cubs standing, Yellowstone National Park, Wyoming, United States of America, North America

Grizzly Bear (Ursus arctos horribilis) sow and two cubs of the year or spring cubs standing, Yellowstone National Park, Wyoming, United States of America, North America

Aura Borealis (Northern lights) in Denali Wilderness National Park, Alaska, United States of America, North America

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

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

Red Fox (Vulpes vulpes) (Vulpes fulva) running in the snow in winter, Grand Teton National Park, Wyoming, United States of America, North America

Bison (Bison bison) covered with snow in the winter, Yellowstone National Park, Wyoming, United States of America, North America

Bison (Bison bison) covered with snow in the winter, Yellowstone National Park, Wyoming, United States of America, North America

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

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

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

Lakich'inei Pole, Tlingit totem pole, lit by sun in rainforest, Sitka National Historic Park, Sitka, Baranof Island, Alaska, United States of America, North America

Lakich'inei Pole, Tlingit totem pole, lit by sun in rainforest, Sitka National Historic Park, Sitka, Baranof Island, Alaska, United States of America, North America

K'alyaan Pole, Tlingit totem pole, rainforest clearing, summer, Sitka National Historic Park, Sitka, Baranof Island, Alaska, United States of America, North America

Mosquito Legend Pole, Tlingit totem pole, rainforest, summer, Sitka National Historic Park, Sitka, Baranof Island, Alaska, United States of America, North America

K'alyaan Pole, Tlingit totem pole, rainforest clearing, summer, Sitka National Historic Park, Sitka, Baranof Island, Alaska, United States of America, North America

Black Bear (Ursus americanus) sow and two chocolate cubs-of-the-year, Yellowstone National Park, Wyoming, United States of America, North America

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

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

Old Faithful geyser blowing, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Redwood National State Park, UNESCO World Heritage Site, California, United States of America, North America

Black Bear (Ursus americanus) sow and chocolate cub-of-the-year, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Grizzly Bear (Ursus arctos horribilis), yearling cub, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Black Bear (Ursus americanus), Yellowstone National Park, Wyoming, United States of America, North America

Black Bear (Ursus americanus) sow and yearling cub playing, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Grizzly Bear (Ursus arctos horribilis), yearling cub, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Bison (Bison bison) calf, 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

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

Black Bear (Ursus americanus) sow and yearling cub playing, Yellowstone National Park, UNESCO World Heritage Site, 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

Scenery, Homer, Harding Icefield, Kachemak Bay, Kenai Fjords National Park, Alaska, United States of America, North America

Coyote (Canis latrans) in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Bushes and trees growing on a sandstone hill, Zion National Park, Utah, United States of America, North America

John Moulton Barn, Mormon Row, Grand Teton National Park, Wyoming, United States of America, North America

View along the Virgin River to the Watchman, autumn, Canyon Junction, Zion National Park, Utah, United States of America, North America

View across the Virgin River to Abraham and Isaac Peaks, sunrise, Court of the Patriarchs, Zion National Park, Utah, United States of America, North America

Hikers in front of Lamplugh Glacier, Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Alaska, United States of America, North America

Hiking the Angel's Landing Trail in Zion National Park, Utah, United States of America, North America

Joshua tree at sunset, Jumbo Rocks area, Joshua Tree National Park, California, United States of America, North America

Lone Star Geyser erupts and creates rainbow, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Fort Jefferson, Dry Tortugas National Park, Florida Keys, Florida, United States of America, North America

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

Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, Arizona, United States of America, North America

A Red Fox sits on the sandy soil at Sandy Hook, part of the Gateway National Recreation Area, a United States National Park. He stares directly at the camera. Sandy Hook is a barrier peninsula on the Atlantic Ocean.

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

Photographer shooting the valley floor from Angel's Landing Trail in Zion National Park, Utah, United States of America, North America

Pool in slick rock reflecting first light on a sandstone hill, Zion National Park, Utah, United States of America, North America

Aerial photo of Grand Canyon from Papillon Helicopter, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Grizzly bear (Ursus arctos horribilis) eating berries, Glacier National Park, Montana, United States of America, North America

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

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

Swiftcurrent Lake, Many Glacier Area, Glacier National Park, Montana, 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

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

Backlit frost-covered cottonwood trees in the winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Lake Quinault, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America (U.S.A.), North America

Red-legged frog (Rana aurora), Olympic National Park, Washington state, United States of America, North America

Orange clouds at dawn above Longs Peak, Rocky Mountain National Park, Colorado, United States of America, North America

Backlit red ridges surrounded by the clouds of an early morning temperature inversion, Bryce Canyon National Park, Utah, United States of America, North America

River Otter (Lutra canadensis) pups, Yellowstone National Park, Wyoming, United States of America, North America

Cinnamon Black Bear (Ursus americanus) yearling cub, Yellowstone National Park, Wyoming, United States of America, North America

Uinta Ground Squirrel (Urocitellus armatus) among Mountain Bluebell (Mertensia ciliata), Yellowstone National Park, Wyoming, United States of America, North America

Haleakala Crater, in Haleakala National Park, Maui's dormant volcano, Hawaii, United States of America, Pacific, North America

Petrified logs from the late Triassic period, 225 million years ago, Long Logs Trail, Petrified Forest National Park, 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

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

Chaco Culture National Historic Park, World Heritage Site, Pueblo Bonito, kiva (foreground), UNESCO World Heritage Site, New Mexico, United States of America, North America

Badlands at Zabriskie Point, Death Valley National Park, California, United States of America, North America

Sunset at the Salt pan polygons, Badwater Basin, 282ft below sea level and the lowest place in North America, Death Valley National Park, California, United States of America, North America

Mount McKinley reflected in a pond, Denali National Park and Preserve, Alaska, United States of America, North America

Yellow pine chipmunk (Eutamias amoenus) eating sagebrush leaves, Yellowstone National Park, Wyoming, United States of America, North America

Soldier riding a horse petroglyph, Chetro Ketl, Chaco Culture National Historical Park, UNESCO World Heritage Site, New Mexico, United States of America, North America

The Virgin River, foot bridge to access the Emerald Pools, Zion National Park, Utah, United States of America, North America

Wild horse (Equus Caballus), Theodore Roosevelt National Park, North Dakota, United States of America, North America

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

Fog mingling with evergreen trees with some cottonwoods, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, 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

Twilight at Tioga Lake, 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