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Sunset over The Pacific Ocean at Andrew Molera State Park south of Monterey, Big Sur, California, United States of America, North America

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

Sky Walk over the Grand Canyon and Colorado River, UNESCO World Heritage Site, Arizona, 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

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

Close-up of water over rocks, Great Smoky Mountains National Park, UNESCO World Heritage Site, Tennessee, United States of America, North America

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

View over the Colorado River from the Slickrock trail, Moab, Utah, United States of America, North America

Travertine terraces in Mammoth hot springs terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Native Pueblo rock art, Lower Calf Creek Falls Trail, Grand Staircase-Escalante National Monument, Utah, United States of America, North America

Cattle grazing in front of the mountains of the Caribou National Forest, Wyoming, United States of America, North America

Travertine terraces in Mammoth hot springs terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Sandstone chimneys in the Kodachrome Basin State Park, Utah, United States of America, North America

Early sunrays shining on the pinnacles of the Bryce Canyon National Park, Utah, United States of America, North America

Tumalo Falls, a 97-foot waterfall on Tumalo Creek, in the Cascade Range west of Bend, Oregon, United States of America, North America

Cathedral Rocks from Yosemite Valley, UNESCO World Heritage Site, California, United States of America, North America

Sunset over Grand Canyon South Rim, UNESCO World Heritage Site, Arizona, United States of America, North America

West Rim, Grand Canyon and Colorado River, UNESCO World Heritage Site, Arizona, United States of America, North America

Panorama of Wilson Mountain and Wilson Canyon in Sedona, Arizona, United States of America, North America

Sandstone formations in evening light with scrub in foreground, Monument Valley Tribal Park, Arizona, United States of America, North America

The colourful sandstone formations of the Bryce Canyon National Park in the late afternoon, 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

The Upper Falls in the Grand Canyon of Yellowstone in the Yellowstone National Park, UNESCO World Heritage Site, Wyoming, 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

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

Walkway through cold lava in the Craters of the Moon National Park, Idaho, United States of America, North America

Road leading through the Grand Staircase Escalante National Monument, Utah, United States of America, North America

Late sunlight glowing on the rocks of the Zion National Park, Utah, United States of America, North America

Redrock sandstone formations in the Kodachrome Basin State Park, Utah, United States of America, North America

Wizard Island and the still waters of Crater Lake at dawn, the deepest lake in the U.S.A., part of the Cascade Range, Oregon, United States of America, North America

View of Bixby Bridge on Big Sur Coastline, Highway 1, Pacific Coast Highway, Pacific Ocean, California, United States of America, North America

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

Rock face and waterfalls, Emerald Pools, Zion National Park, Utah, United States of America, North America

Erosion patterns in a small drainage, Bisti Wilderness, New Mexico, United States of America, North America

Red sandstone cliffs in the Capitol Reef National Park, Utah, United States of America, North America

South Window Arch seen through Turret Arch, Arches National Park, Utah, United States of America, North America

The Colorado River with Castle Valley in the background, near Moab, Utah, United States of America, North America

Cold lava walls in the Craters of the Moon National Park, Idaho, United States of America, North America

View over the cliffs of the Zion National Park and the Angel's Landing path, Zion National Park, Utah, United States of America, North America

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

Late sunlight glowing on the rocks of the Zion National Park, Utah, United States of America, North America

View over the Lewis River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

The colourful sandstone formations of the Bryce Canyon National Park in the late afternoon, Utah, United States of America, North America

Beautiful red sandstone formations in the Arches National Park, Utah, 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

View of trail lights in Red Rock Canyon National Recreation Area, Las Vegas, Nevada, United States of America, North America

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

Golden-mantled squirrel (Citellus lateralis), Rocky Mountain National Park, Colorado, United States of America, North America

Sipapu Natural Bridge, Natural Bridges National Monument, Utah, 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

View over the Zion National Park from Angel's Landing, Zion National Park, Utah, United States of America, North America

Road leading in the Teton range in the Grand Teton National Park, Wyoming, United States of America, North America

Trekkers walking along the Slickrock trail near, Moab, Utah, United States of America, North America

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