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View of the Polychrome Mountains from lookout point on the park road inside Denali National Park and Preserve, Alaska, United States of America
Riding the bus along the 92 mile-long road into Denali National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Young brown bear (Ursus arctos) scratching its back on the gravel at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) scratching its back on tree, Brooks River, Katmai National Park near Bristol Bay, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Young brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bears (Ursus arctos) disputing fishing rights for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear sow (Ursus arctos) watching human activities at the Brooks River, Katmai National Park, Alaska, United States of America
Young brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon in the Brooks River, Katmai National Park, Alaska, United States of America
Alaskan brown bears (Ursus arctos) sow and cubs foraging for salmon in the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Dry waterfall cliffs, Johnson Canyon between Bainbridge Steel and Stone Dams near Ash Fork, Kaibab National Forest, Arizona, United States of America
Bison (Bison bison) cows in the snow with frost-covered trees in the winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Late afternoon light on the Crater Lake of the Crater Lake National Park, Oregon, United States of America, North America
Yosemite Falls, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
Agua Canyon, Bryce National Park, Utah, United States of America, North America
Moraine Creek (River), Katmai National Park and Reserve, Alaska, United States of America, North America
Northern fur seal (Callorhinus ursinus), Resurrection Bay, Kenai Fjords National Park, Alaska, United States of America, North America
An adult brown bear (Ursus arctos) fishing for salmon at Brooks Falls, Katmai National Park and Preserve, Alaska, United States of America, North America
Grand Prismatic Spring, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Pecos National Historical Park, New Mexico, United States of America, North America
Stand up paddle boarders on String Lake, Grand Teton National Park, Wyoming, United States of America, North America
Hoh Rainforest, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America
Woman in Desert Loop Trail in Carlsbad Caverns National Park, New Mexico, United States of America, North America
Huge formations of Bentonite Clay called the Teepees in the Petrified Forest National Park, Arizona, United States of America, North America
Early light on Mount Rainier from the Burroughs Mountain Trail, Mount Rainier National Park, Washington State, United States of America, North America
Adult hoary marmot (Marmota caligata), on the Skyline Trail, Mount Rainier National Park, Washington State, United States of America, North America
Roosevelt Elk at Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America
View along the Pa'rus Trail to Mount Spry and the East Temple, autumn, Zion National Park, Utah, United States of America, North America
Curious Steller sea lions (Eumetopias jubatus), South Marble Islands, Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America
Desert sunset panorama with Chisos Mountains in the background, Big Bend National Park, Texas, United States of America, North America
Grand Canyon viewed from the west side of Maricopa Point along the Hermit Road, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
A dry waterfall made of purple bentonite in the Flat Tops of Petrified Forest National Park, Arizona, United States of America, North America
Mammoth Hot Springs Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Woman taking in the scenery while crossing a bridge in Mount Rainier National Park, Washington State, United States of America, North America
Fisheye view of Hance Canyon from the South Rim of Grand Canyon with Grandview Point is on the left, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
A dry waterfall in Crystal Creek below Crystal Mesa west of Hamilili Point in Petrified Forest National Park, Arizona, United States of America, North America
Elk (Cervus canadensis) in Rocky Mountain National Park, Colorado, United States of America, North America
A warning sign to stay on the trail to the historic Agate House in Petrified Forest National Park, Arizona, United States of America, North America
An information sign detailing the history of Agate House in Petrified Forest National Park, Arizona, United States of America, North America
A divide in the trail loop for the Giant Logs trail at Petrified Forest National Park with the Rainbow Forest Museum on upper left, Arizona, United States of America, North America
Steps along the Giant Logs Trail leading to a scenic overlook in Petrified Forest National Park, Arizona, United States of America, North America
Hills of purple and gray bentonite near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America
A solitary rock hoodoo in the purple badlands near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America
A solitary rock hoodoo in the purple badlands near Hamilili Point on the south end of Petrified Forest National Park, Arizona, United States of America, North America
The map sign at the gateway for the Long Logs Trail and Agate House in Petrified Forest National Park, Arizona, United States of America, North America
A lone hoodoo rock on the edge of a ridge overlooking the Jim Camp Wash on the south end of Petrified Forest National Park, Arizona, United States of America, North America
Arctic squirrel (Citellus parry), Denali National Park, Alaska, United States of America, North America
Pond next to St. Mary Lake, Glacier National Park, Montana, United States of America, North America
Pinnacles and rock formations caused by erosion, in the Bryce Canyon National Park in Utah, United States of America, North America
Giant sequoia trees, Mariposa Grove, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America
A gap between a stack of balanced boulders on a cliff east of Grandview Point at Grand Canyon South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Bull moose (Alces alces) amongst autumn (fall) vegetation; Grand Teton National Park, Wyoming, United States of America, North America
Steam and turquoise depths at Black Pool, dawn, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Storm approaching Shoshone Point on the South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Ancient Indian rock art, petroglyphs, Newspaper Rock, near The Needles section of Canyonlands National Park, Utah, United States of America, North America
Ponderosa pine tree, Zion National Park in autumn, Utah, United States of America, North America
Snowscape with stream and trees in the fog, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
A climber bouldering on the large granite boulders near Camp 4, the National Park Service campground underneath El Capitan, Yosemite Valley, California, United States of America, North America
Grizzly bear (Ursus horribilis) in the fall, Denali National Park and Preserve, Alaska, United States of America, North America
A close up view of Lamplugh Glacier in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America
A view in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America
Adult surf scoters (Melanitta perspicillata) in flight in Glacier Bay National Park, UNESCO World Heritage Site, Southeast Alaska, Pacific Ocean, United States of America, North America
Guests from the Lindblad Expeditions ship National Geographic Sea Bird in Glacier Bay National Park, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America
Guests from the Lindblad Expeditions ship National Geographic Sea Bird in Glacier Bay National Park, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America
The Lindblad Expeditions ship National Geographic Sea Bird operating in Glacier Bay National Park, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America
Zion Lodge, the only lodge in Zion National Park, Utah, United States of America, North America
The Billings Gap Overlook on the east side of Blue Mesa in Petrified Forest National Park, Arizona, United States of America, North America
Merced River at Valley View, Yosemite National Park, UNESCO World Heritage Site, Sierra Nevada, Central California, California, United States of America, North America
Natural rock formations with Manly Beacon at Zabriskie Point at dusk, Death Valley National Park, Eastern California, California, United States of America, North America
Close up of Engelmann's prickly-pear (Opuntia engelmannii) cactus in bloom, Watchman trail, Zion National Park, Utah, United States of America, North America
Watchman mountain, Watchman trail, Zion National Park, Utah, United States of America, North America
Kayenta trail leading through forest, Zion National Park, Utah, United States of America, North America
Zion valley and Virgin River seen from Kayenta trail, Zion National Park, Utah, United States of America, North America
Bryce Canyon amphitheater at sunset, Inspiration Point, Bryce Canyon National Park, Utah, United States of America, North America
Salt pans on sunny day, Badwater Basin, Death Valley National Park, Eastern California, California, United States of America, North America
Bryce Canyon amphitheater at sunset, Inspiration Point, Bryce Canyon National Park, Utah, United States of America, North America
Bryce Canyon amphitheater at sunset, Bryce Point, Bryce Canyon National Park, Utah, United States of America, North America
Bryce Canyon amphitheater, Inspiration Point, Bryce Canyon National Park, Utah, United States of America, North America
Bryce Canyon amphitheater at sunset, Inspiration Point, Bryce Canyon National Park, Utah, United States of America, North America
Bryce Canyon amphitheater at sunset, Inspiration Point, Bryce Canyon National Park, Utah, United States of America, North America