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Hall of Mosses rainforest, Olympic National Park, UNESCO World Heritage Site, Washington State, United States of America, North America

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

Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, 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

Rock formations, Needles District, Canyonlands National Park, Utah, United States of America, North America

Clouds reflecting in the Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Alligator, Anhinga Trail, Everglades National Park, Florida, United States of America, North America

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

Part of the North Unit of Badlands National Park, carved out of the prairies by rapid water erosion of sediments, South Dakota, United States of America, North America

Tunnel Log, 275 ft long, which fell in 1937, Sequoiadendron giganteum, Sequoia National Park, California, United States of America, North America

Coastal brown bear, Ursus arctos, Lake Clark National Park, Alaska, United States of America, North America

Grand Canyon, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Killer whale (orca) pod (Orcinus orca), Resurrection Bay, Kenai Fjords National Park, Alaska, United States of America, North America

Russian Bishop's House, built 1843 in Sitka spruce, Sitka National Historical Park sign, rare sunny day, Southeast Alaska, United States of America, North America

Farmstead in the old pioneer community at Cades Cove, Great Smoky Mountains National Park, UNESCO World Heritage Site, Appalachians, Tennessee, United States of America (U.S.A.), North America

View from the Alum Cave Bluffs trail in Great Smoky Mountains National Park, UNESCO World Heritage Site, Tennessee, United States of America (U.S.A.), North America

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

St. Mary Lake and Wild Goose Island, Glacier National Park, Rocky Mountains, Montana, United States of America (USA), North America

Second Beach, Olympic National Park, UNESCO World Heritage Site, Washington state, United States of America, North America

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

Bayou in swampland at Jean Lafitte National Historic Park and Preserve, south of New Orleans, Louisiana, United States of America (U.S.A.), North America

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

View east from Logan Pass, Glacier National Park, Montana, United States of America (U.S.A.), North America

Lake of the Clouds, Carlsbad Caverns National Park, UNESCO World Heritage Site, New Mexico, United States of America, North America

Redoubt Mountain Lodge on Crescent Lake, Lake Clark National Park and Preserve, Alaska, 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

Second Beach, Olympic National Park, UNESCO World Heritage Site, Washington state, 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

Great Blue Heron, Everglades National Park, UNESCO World Heritage Site, Florida, United States of America, North America

Lower Falls of Yellowstone River, 94m high at head of canyon, 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

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

Saguaro cactus (Cereus giganteus), Saguaro National Park (West), Tucson, Arizona, United States of America, North America

Small plane landed on glacier in Denali National Park, Alaska, United States of America, North America

Swamps, Everglades National Park, UNESCO World Heritage Site, Florida, 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

Geysers in Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America

Rio Grande River, Santa Elena Canyon, Big Bend National Park, Texas, 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

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

Turret Arch through North Window at sunrise, Arches National Park, Moab, Utah, 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

Terraces, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (USA), 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

English Camp, San Juan Island National Historical Park, San Juan Islands, Washington state, 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

View from the Rim, Grand Canyon of the Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

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

Sunrise, Yellowstone Lake, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (USA), North America

Snowmobiling in the western area of Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America

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

The Stars & Stripes in front of the Heritage Centre, White Mountain National Park, New Hampshire, New England, United States of America, North America

Angel's Landing and Virgin River, Zion National Park, Utah, United States of America (USA), North America

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

North American black bear crossing road, Yellowstone National Park, Wyoming, United States of America, North America

Cottonwood trees on the banks of the Virgin River, Zion National Park, Utah, United States of America, North America

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

Minerva Spring, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (USA), North America

Blue Mesa, Petrified Forest National Park, Arizona, United States of America (U.S.A.), North America

Late afternoon, Yovimpa Point, Bryce Canyon National Park, Utah, United States of America, North America

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

Part of the North Unit of Badlands National Park, South Dakota, United States of America, North America

Egret, Everglades National Park, UNESCO World Heritage Site, Florida, United States of America, North America

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

Steam from hot springs and snow-free hot ground in Midway Basin in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

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

Buffalo beside Firehole River in winter in Midway geothermal basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America

Vernal Falls, 318ft., Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Spruce Tree House, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America

Geysers in Yellowstone National Park, UNESCO World Heritage Site, Montana, United States of America, North America

El Capitan, Yosemite National Park, UNESCO World Heritage Site, California, United States of America (U.S.A.), North America

View across meadows to Cathedral Rocks, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Petroglyphs carved 1000 years ago by Fremont Native American people in the iron oxide 'desert varnish' on the sandstone of Cub Creek Valley in this fossil park, Dinosaur National Monument, Utah, United States of America (USA), North America

Petroglyphs carved 1000 years ago by Fremont Native American people in the iron oxide 'desert varnish' on the sandstone of Cub Creek Valley in this fossil park, Dinosaur National Monument, Utah, United States of America (USA), North America

Juniper tree with curved trunk, Canyonlands National Park, Utah, United States of America, North America

Petroglyph of male figure carved 1000 years ago by Fremont Native American people in the iron oxide 'desert varnish' on the sandstone of Cub Creek Valley in this fossil park, Dinosaur National Monument, Utah, United States of America (USA), North America

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