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

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

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

Looking east from the Deer Park, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

Sand dunes at dusk, White Sands National Monument, New Mexico, United States of America, North America

Saguaro cactus, Saguaro National Park, Tuscon Mountain District west unit, Tucson, Arizona, United States of America, North America

Rock formation, Courthouse Towers area, Arches National Park, Utah, United States of America, North America

Sunrise over the Lamar Valley, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Undine Falls, near Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Run off area near Black Pool Spring, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Snow forms, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

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

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

Outlook for the pinnacles in the beautiful rock formations of Bryce Canyon National Park, Utah, United States of America, North America

Grand Canyon of the Yellowstone River, from Inspiration Point, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Bison and Mount Washburn in early morning light, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Morning Glory Pool, Upper Geyser Basin, 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

A forest fire destroys an area of forest in Yosemite Valley in the Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Clark's nutcracker (Nucifraga columbiana), Rocky Mountain National Park, Colorado, United States of America, North America

Juan Rodriguez Cabrillo Statue, Cabrillo National Monument, San Diego, California, United States of America, North America

View of Lower Falls from Red Rock Point, Grand Canyon of the Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Stream through wildflowers, American Basin, Uncompahgre National Forest, Colorado, United States of America, North America

Grand Canyon of the Yellowstone River, from Inspiration Point, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Chaco ruins in the Chaco Culture National Historic Park, UNESCO World Heritage Site, New Mexico, United States of America, North America

Petrified Tree near Tower-Roosevelt, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

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

Trunks of lodgepole pines on Blacktail Deer Plateau, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Louisiana heron (Hydranassa tricolor), Everglades National Park, Florida, United States of America, North America

Alaskan brown bear (Ursus middendorffi), Katmai National Park and Preserve, Alaska, United States of America, North America

Minerva Terrace, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Castle Geyser, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Cliff palace ruins dating from 1200-1300 AD shaded in limestone overhang, Mesa Verde, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America (U.S.A.), North America

Juniper tree with curved trunk, Canyonlands National Park, Utah, United States of America (U.S.A.), North America

Half Dome mountain peak and chapel, built in 1879, the oldest building still in use, Yosemite National Park, UNESCO World Heritage Site, California, United States of America (USA), North America

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

Dunes at dawn, White Sands National Park, New Mexico, United States of America (U.S.A.), North America

Turret Arch through North Window at sunrise, Arches National Park, Moab, Utah, United States of America (U.S.A.), North America

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

Mesa Arch at dawn looking towards Washerwoman Arch, Islands in the Sky section of Canyonlands National Park, Utah, United States of America, North America

False Kiva, Ancient Indian Ruins, Canyonlands National Park, Islands in the Sky, Utah, United States of America, North America

Mesa Arch at dawn looking towards Washerwoman Arch, Islands in the Sky section of Canyonlands National Park, Utah, United States of America, North America

Green River Overlook, Islands in the Sky section of Canyonlands National Park, Utah, United States of America, North America

Green River Overlook, Canyonlands National Park, Islands in the Sky, Utah, United States of America, North America

Sunrise on North Arch and Tower Arch in the Windows section of Arches National Park, Utah, 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

View of Washerwoman Arch, Islands in the Sky, Canyonlands National Park, Utah, United States of America, North America

Green River Overlook, Islands in the Sky section of Canyonlands National Park, Utah, United States of America, North America

Cliffs along Green River Overlook, Islands in the Sky, Canyonlands National Park, Utah, United States of America, North America

Palette Spring, Travertine Terraces, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Beaver (Castor canadensis) feeding in Soda Butte Creek, Yellowstone National Park, Wyoming, United States of America, North America

Sunrise on the colourful pinnacles and hoodoos at Inspiration Point in Bryce Canyon National Park, Utah, United States of America, North America

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

Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Tourists on boardwalk over the mineral runoff from Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Grand Geyser erupting over sinter terrace, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

The Cathedral Group of Mount Teewinot, Mount Owen and Grand Teton reflected in the Snake River, Schwabacher's Landing, Grand Teton National Park, Wyoming, United States of America, North America

Tourists on the boardwalk around the Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Bull elk near Firehole River, Yellowstone National Park, UNESCO World Heritage Site, 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

Backlit hoodoos and Thor's Hammer, Bryce Canyon National Park, Utah, United States of America, North America

Virgin River flowing through the Virgin Narrows, Zion National Park, Utah, United States of America, North America