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Reflections in Snake River, Grand Tetons National Park, Wyoming, United States of America, North America
Lighthouse, Fort Jefferson, Dry Tortugas National Park, Florida, United States of America, North America
Frosted sagebrush at dawn, Grand Teton National Park, Wyoming, United States of America, North America
Gullies eroded into the Pierre shales below Loop Road, Sage Creek wilderness, Badlands National Park, South Dakota, United States of America, North America
Winter eruption, Old Faithful geyser, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Hot lava flowing onto beach and into the ocean, Kilauea Volcano, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii (Big Island), Hawaii, United States of America, North America
Male sagebrush lizard (Sceloporus graciosus) looking at camera, Canyonlands National Park, Utah, United States of America, North America
Scotty's Castle, a major attraction and historic home in Death Valley National Park, California, United States of America, North America
Petroglyph Rock Art in Capitol Reef National Park, Utah, United States of America, North America
Sagamore Hill, home of President Theodore Roosevelt, National Park, Oyster Bay, Long Island, New York, United States of America, North America
Climbing expedition on Mount McKinley, 6194m, Denali National Park, Alaska, United States of America, North America
Bison, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Wooden seat on the rim of the Amphitheatre, in the Bryce Canyon National Park, Utah, United States of America, North America
Zabriskie Point, Death Valley National Park, California, United States of America, North America
Fort Jefferson, Dry Tortugas National Park, Florida, United States of America, North America
Old cottage with colourful foliage in the Indian summer, Great Smoky National Park, Tennessee, United States of America, North America
Camp 2, climbing expedition on Mount McKinley, 6194m, Denali National Park, Alaska, United States of America, North America
Lavender evening-primrose (Calyophus lavandulifolia), The Needles District, Canyonlands National Park, Utah, United States of America, North America
English Camp, San Juan Island National Historical Park, San Juan Islands, Washington state, United States of America, North America
Cake Rock on Rialto Beach, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America
Geothermal steam from geyser vent between eruptions, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Hot water in pools on calcite terraces deposited by Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
The Racetrack Point, Death Valley National Park, California, United States of America, North America
Salt pan polygons at Badwater Basin, 282ft below sea level and the lowest place in North America, Death Valley National Park, California, United States of America, North America
Snow on pinnacles and rock formations in the Bryce Canyon National Park in Utah, United States of America, North America
Balanced Rock, a pinnacle of red sandstone caused by erosion, in the Arches National Park in Utah, United States of America, North America
Castle and Sawmill Geysers in eruption in Old Faithful Geyser Basin in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Blisters measuring about 10 cm across in boiling mud pool, Mud volcano, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Pueblo ruins in Mesa Verde containing some of the most elaborte Pueblo dwellings found today, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America
Tourists having a picnic, Shenandoah National Park, Virginia, United States of America, North America
Mountain harebell (Campanula lasiocarpa), Glacier National Park, Montana, United States of America, North America
Mountain death camas (Elegant Deathcamas) (Alkali Grass) (Zigadenus elegans), Glacier National Park, Montana, United States of America, North America
Mountain death camas (Elegant Deathcamas) (Alkali Grass) (Zigadenus elegans), Glacier National Park, Montana, United States of America, North America
Historic Moore Homestead, Klondike Gold Rush National Historical Park, Skagway, Southeast Alaska, United States of America, North America
Governors Island, Park, National Historic Landmark Dstrict, New York City, New York Harbor, United States of America, North America
Carlsbad Caverns, Carlsbad Caverns National Park, UNESCO World Heritage Site, New Mexico, United States of America, North America
East entrance, Zion National Park, Utah, United States of America, North America
Water lilies on Swan Lake, Grand Teton National Park, Rocky Mountains, Wyoming, United States of America, North America
Bison and the Teton Range, Grand Teton National Park, Wyoming, United States of America, North America
Reflections of trees in fall colours and cliffs of Zion, in a lake, near the Zion National Park, Springdale, Utah, United States of America, North America
The Snake River cutting through terrace 2000m below summits, Grand Teton National Park, Wyoming, USA, North America
Echinus Geyser, erupts every hour in Norris Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Hoodoos, Bryce amphitheater, Bryce Canyon National Park, Utah, United States of America (U.S.A.), North America
Snowmobiling in the western area of Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America
Great Blue Heron, Everglades National Park, UNESCO World Heritage Site, Florida, United States of America, North America
Zabriskie Point, Death Valley National Park, California, United States of America, North America
Gnarled old tree trunk in Mesa Verde National Park, Colorado, United States of America, North America
Fort Jefferson, Dry Tortugas National Park, Florida, United States of America, North America
Mountain harebell (Campanula lasiocarpa) with frost, Glacier National Park, Montana, United States of America, North America
Dwarf evening-primrose (tufted evening-primrose) (white tufted evening-primrose ) (morning-lily) (handkerchief plant) (Oenothera caespitosa), Arches National Park, Utah, United States of America, North America
Tourists viewing the Morning Glory Pool, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Tundra, Broad Pass, Denali National Park, Alaska Range, Alaska, United States of America, North America
Old wooden barn on farmstead in the old pioneer community at Cades Cove, Great Smoky Mountains National Park, Tennessee, United States of America, North America
Swamps, Everglades National Park, UNESCO World Heritage Site, Florida, United States of America, North America
Big Bend National Park, Texas, United States of America, North America
Small plane landed on glacier in Denali National Park, Alaska, United States of America, North America
The Racetrack Point, Death Valley National Park, California, United States of America, North America
Woman taking photos, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Crowds of spectators watching Old Faithful Geyser erupting, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, 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
Old North Bridge, Minute Man National Historic Park, Concord, Massachusetts, United States of America, North America
Mountain harebell (Campanula lasiocarpa) with frost, Glacier National Park, Montana, United States of America, North America
Delicate Arch, Arches National Park, Moab, Utah, United States of America, North America
Salt pan polygons at Badwater Basin, 282ft below sea level and the lowest place in North America, Death Valley National Park, California, United States of America, North America
The Hayden Valley, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Steam plumes from hot lava flowing onto the beach and hitting the ocean, Kilauea Volcano, Hawaii Volcanoes National Park, UNESCO World Heritage Site, Island of Hawaii ('Big Island'), Hawaii, United States of America, North America
Rock formations caused by erosion and known as North Window Arch, Arches National Park, Utah, United States of America, North America
Marching Men formation, Arches National Park, Utah, United States of America, North America
Children exploring South Arch in the Windows section of Arches National Park, Utah, United States of America, North America
Artist's Palette, Artist's Drive, Death Valley National Park, California, United States of America, North America
Thor's Hammer, Bryce Canyon National Park, Utah, United States of America, North America
Bison walk through winter storm, Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America
Thor's Hammer near Sunset Point, Bryce Canyon National Park, Utah, United States of America, North America
Whipple's fishhook (Sclerocactus whipplei) bloom, The Needles District, Arches National Park, Utah, United States of America, North America
Park Avenue, Arches National Park, Moab, Utah, United States of America, North America
Historic barn and the Teton Range, Grand Tetons National Park, Wyoming, United States of America, North America
Anhinga trail, Everglades National Park, UNESCO World Heritage Site, Florida, United States of America (U.S.A.), North America
Emerald Pool waterfall, Zion National Park, Utah, United States of America, North America
Geysers in Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America
Big Bend National Park, Texas, United States of America, North America
Beaver (Castor canadensis) feeding in Soda Butte Creek, Yellowstone National Park, Wyoming, United States of America, North America
North American black bear crossing road, Yellowstone National Park, Wyoming, United States of America, North America
Whipple's fishhook (Sclerocactus whipplei) bloom, The Needles District, Canyonlands National Park, Utah, United States of America, North America
Alpine marmot, Yosemite National Park, California, United States of America, North America
Indian Creek Valley with red sandstone cliffs in the background, in the Canyonlands National Park, Utah, United States of America, North America
Cottonwood trees in golden fall colours along the banks of the Virgin River, the Mountain of the Sun in the background, in the Zion National Park, Utah, United States of America, North America
Sunrise, Yellowstone Lake, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (USA), North America
Minerva Spring, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (USA), North America
Turret Arch through North Window at sunrise, Arches National Park, Moab, Utah, United States of America, North America
Moulton Ranch, Grand Teton National Park, Wyoming, United States of America, North America
Mesa Verde, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America
The town of Medora in the Roosevelt National Park, North Dakota, United States of America, North America
Cloud trails, Yellowstone National Park, United States of America, North America
Hidden Lake, near Logan Pass, Glacier National Park, High Rocky Mountains, Montana, United States of America, North America
Travertine calcite deposits, Minerva Terrace, Mammoth Hot Springs and Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
General Sherman tree, Sequoia National Park, California, United States of America, North America
Bison and calf, Yellowstone National Park, Wyoming, United States of America, North America
Rio Grande River, Santa Elena Canyon, Big Bend National Park, Texas, United States of America, North America
The Racetrack Point, Death Valley National Park, California, United States of America, North America
Woman's foot on globe, Bad Waters Point, Death Valley National Park, California, United States of America, North America