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Small American black bear (Ursus americanus) with rare white chest markings, on the Big Trees trail, Round Meadow, Sequoia National Park, Sierra Nevada, California, United States of America, North America

Autumn colours of Lake McDonald, Glacier National Park, Montana, United States of America, North America

Reflection Lake, Mount Rainier National Park, Washington State, United States of America, North America

Fiery Furnace, a maze like passageway, Arches National Park, Utah, United States of America, North America

Jackson Lake in the Teton range in the Grand Teton National Park, Wyoming, United States of America, North America

Woman admiring the landscape, Canyonlands National Park, Moab, Utah, United States of America, North America

Rock formation, Green River Overlook, Canyonlands National Park, Moab, Utah, United States of America, North America

Mount St. Helens with wild flowers, Mount St. Helens National Volcanic Monument, Washington State, United States of America, North America

View of rock formations and flora in Red Rock Canyon National Recreation Area, Las Vegas, Nevada, United States of America, North America

Woman at Mormon Row and Teton Range, Grand Teton National Park, Wyoming, United States of America, North America

Schwabacher landing, Teton Range, Grand Teton National Park, Wyoming, United States of America, North America

Oxbow Bend, Teton Range, Grand Teton National Park, Wyoming, United States of America, North America

Oxbow Bend, Teton Range, Grand Teton National Park, Wyoming, United States of America, North America

Yellowstone National Park, UNESCO World Heritage Site, Wyoming, 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

Lower Falls on the Yellowstone River, Grand Canyon of the Yellowstone, from Lookout Point, North Rim, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Dead tree trunks in hot spring area of the Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Wooden boardwalk over the mineral sinter formations on Geyser Hill, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Paradise Divide, Grand Mesa-Uncompahgre-Gunnison National Forest, Colorado, United States of America, North America

The Cliff Palace Indian dwelling, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America

Rock formation on the way to Delicate Arch, Arches National Park, Moab, Grand County, Utah, United States of America, North America

American bison (Bison bison), standing in snow storm, Grand Teton National Park, Wyoming, United States of America, North America

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

Close up of American Bison, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Hurricane Ridge, Olympic National Park, UNESCO World Heritage Site, Washington, United States of America, North America

Fall colours along McDonald Creek, Glacier National Park, Montana, United States of America, North America

Sandstone cliffs reflected in the tranquil waters of Lake Powell, Glen Canyon National Recreation Area, Utah, United States of America, North America

View over the sandstone cliffs of the Grand Staircase Escalante National Monument, Utah, United States of America, North America

Full moon over Fiery Furnace, a maze like passageway, Arches National Park, Utah, United States of America, North America

Multicoloured strata in the Painted Hills unit in the John Day Fossil Beds National Monument, Oregon, United States of America, North America

American Pika (Ochotona princeps), Uncompahgre National Forest, Colorado, United States of America, North America

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

Hiker photographing on the Queens Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America

Hiking the Queens Garden Trail, Bryce Canyon National Park, Utah, United States of America, North America

Mist, rocky shoreline and forest, Inian Islands, Icy Strait, between Chichagof Island and Glacier Bay National Park, Alaska, United States of America, North America

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

Mount Redoubt, Lake Clark National Park and Preserve, Alaska, United States of America, North America

Ancestral Puebloan Petroglyphs, Upper Sand Island, Bears Ears National Monument, Utah, United States of America, North America

View of Yosemite Falls from Yosemite Village, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Oxbow Bend, Teton Range, Grand Teton National Park, Wyoming, United States of America, North America

Mormon Row and Teton Range, Grand Teton National Park, Wyoming, United States of America, North America

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

The summit of Cable Mountain framed by golden autumn foliage, Zion National Park, Utah, United States of America, North America

A pair of brown bears (Ursus arctos) mock fighting at Brooks Falls, Katmai National Park and Preserve, Alaska, United States of America, North America

The Salt Flats of Badwater Basin, the lowest point in North America, Death Valley National Park, California, United States of America, North America

A wild American alligator (Alligator mississippiensis), at night in Shark Valley, Everglades National Park, Florida, United States of America, North America

Whirligig Geyser runoff, Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Trail to Sol Duc Falls, Rain Forest, Olympic National Park, UNESCO World Heritage Site, Washington, United States of America, North America

American bison (Bison Bison) in a driving snow storm, Badlands National Park, South Dakota, United States of America, North America

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

View of hoodoo formations from the Fairyland Trail in Bryce Canyon National Park, Utah, United States of America, North America

Pedestal Ruins, Ancestral Pueblito, Bears Ears National Monument, Utah, United States of America, North America

Bright blue thermal feature in snow, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Reflection Lake, Mount Rainier National Park, Washington State, United States of America, North America

Sandstone rocks reflecting in the Colorado River, Canyonlands National Park, Utah, United States of America, North America

The colourful Grand Canyon of the Yellowstone, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Winstanley Island sunset reflections, Misty Fjords National Monument, Tongass National Forest, Ketchikan, Alaska, United States of America, North America

Mist over the Fairweather Range, Icy Strait, between Chichagof Island and Glacier Bay National Park, UNESCO World Heritage Site, Inside Passage, Alaska, United States of America, North America

Yosemite Valley and Bridalveil Fall from Tunnel View, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

View of Merced River and Upper Yosemite Falls, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

View of Giant Sequoias tree in Tuolumne Grove Trail, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Deer wandering Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

The National Museum of American History in spring, Washington D.C., United States of America, North America

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

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

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

Three Brothers, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Morning sunlight and mist, Reflection Lake, Mount Rainier National Park, Washington State, United States of America, North America

Brown pelican (Pelicanus occidentalis), J. N. "Ding" Darling National Wildlife Refuge, Florida, United States of America, North America

Yellow-crowned night heron (Nyctanassa violacea), J. N. "Ding" Darling National Wildlife Refuge, Florida, United States of America, North America

Bison (Bison bison), Theodore Roosevelt National Park, North Dakota, United States of America, North America

View of Two Towers Bridge from the Fairyland Trail in Bryce Canyon National Park, Utah, United States of America, North America

Dead trees at the top of Canary Spring, Main Terrace, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

View of Bryce Canyon National Park at sunset, from Sunset Point, Utah, United States of America, North America

Field of showy daisy (Erigeron speciosus), Grand Mesa-Uncompahgre-Gunnison National Forest, Colorado, United States of America, North America