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A valley in Petrified Forest National Park, west of the Tepees, Arizona, United States of America, North America

A valley in Petrified Forest National Park, west of the Tepees, Arizona, United States of America, North America

A slot canyon along Cathedral Wash in Glen Canyon Recreation Area, Arizona, United States of America, North America

A rock spire separate from the cliff wall west of Zuni Point at Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

An adult female bighorn sheep (Ovis canadensis nelsoni), in a cave for shade in Grand Canyon National Park, Arizona, United States of America, North America

Night photography at Blacktail Canyon, just before river mile 121, Grand Canyon National Park, Arizona, United States of America, North America

Night photography at Schist, just before river mile 97, Grand Canyon National Park, Arizona, United States of America, North America

Night photography at South Canyon, just before river mile 32, Grand Canyon National Park, Arizona, United States of America, North America

Glen Canyon Dam viewed from main overlook just south of dam, Page, Arizona, United States of America, North America

East view of Canyon De Chelly National Monument North Rim from Antelope House Overlook, left fork leads to Many Cherry Canyon, right fork to Black Rock Canyon, Arizona, United States of America, North America

Caves in the cliff walls, used to store food by ancient Anasazi Indians, Canyon De Chelly National Monument, Arizona, United States of America, North America

Panorama view of the Junction between the north and south forks of Canyon De Chelly National Monument, with Dog Rock rock formation on the far left, Arizona, United States of America, North America

A steel picnic table near a cliff on the west side of Mohave Point at the Grand Canyon, UNESCO World Heritage Site, Arizona, United States of America, North America

Sandstone formatios at first light, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Colorado River dividing California and Arizona, near Parker, Arizona, United States of America, North America

Grand Canyon North Rim viewed from Roosevelt Point with Tritle Peak on the left and Atoko Point on the right, Gand Canyon, Arizona, United States of America, North Amerca

An overlook along the Transept Trail at Grand Canyon North Rim at twilight, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Sandstone formations, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Saguaro cactus (Carnegiea gigantea), photographed at night in the Sweetwater Preserve, Tucson, 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

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

Hikers in Marble Canyon along the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View from Cape Royal, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View from Cape Royal, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Giant petrified logs on the Purple Peninsula in Petrified Forest National Park, Arizona, United States of America, North America

An area south of the Tepees in Petrified Forest National Park known as the Little Tepees, Arizona, United States of America, North America

A valley in Petrified Forest National Park, west of the Tepees, Arizona, United States of America, North America

The Desert View Watchtower at Grand Canyon viewed from below the cliffs east of Navajo Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Various hoodoos in Angels Garden at Petrified Forest National Park, Arizona, United States of America, North America

Sandstone cones at first light, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Grand Canyon from Navajo Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Sandstone formations with clouds, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

View of Hermit Canyon and Hermit Basin from the Boucher Trail at Grand Canyon with Pima Point on the upper left, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, 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

The cliffs of Bright Angel Canyon along the Bright Angel Trail in winter at sunrise on the South Rim of Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Floating down the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of the North Rim of Grand Canyon National Park from Bright Angel Point, UNESCO World Heritage Site, Arizona, United States of America, North America

View from Cape Royal at sunrise, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Ancient Indian Ruins on the edge of a cliff east of Papago Point at Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A view of the upper Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Ancient Indian Ruins on the north side of Cockscomb Butte in Sedona, Arizona, United States of America, North America

View of Fay Canyon in Sedona from the end of the trail, Arizona, United States of America, North America

Ancient Indian Ruins under Fay Arch in Fay Canyon in Sedona, Arizona, United States of America, North America

Oza Butte viewed from Bright Angel Point on North Rim after sundown, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Badlands with yellow, tan, and purple dirt, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Sandstone formations and rock with clouds, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Giant saguaro cactus (Carnegiea gigantea), under full moon in the Catalina Mountains, Tucson, Arizona, United States of America, North America

Hermit Canyon at Grand Canyon viewed from the east side of Yuma Point along the Boucher Trail with Pima Point on the upper right, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, 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

The cliffs of Bright Angel Canyon along the Bright Angel Trail in winter near midday on the South Rim of Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View of the North Rim of Grand Canyon National Park from Bright Angel Point, UNESCO World Heritage Site, Arizona, United States of America, North America

Rafters above their boats on the Colorado River through the Grand Canyon, Arizona, United States of America, North America

View from Cape Royal, North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Photographing at the Puebloan granaries at Upper Nankoweap, Grand Canyon National Park, Arizona, United States of America, North America

View of Antelope Point, on the left, in Canyon De Chelly from just west of Tseyi Overlook, Arizona, United States of America, North America

Ancient Indian petroglyphs along the Onyx Trail at Petrified Forest National Park, Arizona, United States of America, North America

Grand Canyon viewed west of Navajo Point, Grand Canyon National Park, UNESCO World Heritage Site, 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

Mitten from the desert floor, late afternoon, Monument Valley Navajo Tribal Park, Utah Arizona border, United States of America, North America

View of Hermit Canyon from the east side of Yuma Point at Grand Canyon Arizona along the Boucher Trail with Pima Point on the upper right, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

View from Cape Royal Point of the north rim of Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

A view of the upper Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Commercial oar boat runs the Deubendorff Rapid, just past river mile 132, Grand Canyon National Park, Arizona, United States of America, North America

A view of the Puebloan granaries at Upper Nankoweap, Grand Canyon National Park, Arizona, United States of America, North America

Looking south from Cape Royal on the North Rim at dawn, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Sunrise over the Left and Right Mittens, Monument Valley Navajo Tribal Park, Arizona, United States of America, North America

Dawn over Left and Right Mittens, Monument Valley Navajo Tribal Park, Arizona, United States of America, North America

View of Fay Canyon in Sedona from the end of the trail, Arizona, United States of America, North America

Ancient Indian Ruins under Fay Arch in Fay Canyon in Sedona, Arizona, United States of America, North America

Angels Window Overlook on North Rim of Grand Canyon at sunrise, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The first tunnel along Bright Angel Trail in winter under Moonlight on the South Rim of Grand Canyon, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The cliffs of Bright Angel Canyon at Grand Canyon viewed from the start of Garden Creek Canyon along Bright Angel Trail, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

An area south of the Tepees in Petrified Forest National Park known as the Little Tepees, Arizona, United States of America, North America

Hiking to the Puebloan granaries at Upper Nankoweap, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Night photography at South Canyon, just before river mile 32, Grand Canyon National Park, Arizona, United States of America, North America

Glen Canyon Recreation Area with, on the left, Vermillion Cliffs National Monument and Marble Canyon, viewed from an observation point along US89 south of Page, Arizona, United States of America, North America

Grand Canyon view from cliffs east of the Desert View Point, with Cedar Mountain in the distance on the right, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Angels Window at Cape Royal on the North Rim of Grand Canyon at sunrise, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

The Paria River flowing through Paria Canyon in the Glen Canyon Recreation Area, Arizona, United States of America, North America

View of a rock formation called Cathedral Rock from within Chocolate Canyon, Glen Canyon Recreation Area, Arizona, United States of America, North America

Grand Canyon viewed before sunset, west of Papago Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Whitmore Canyon from the helicopter, just before river mile 187, Grand Canyon National Park, Arizona, United States of America, North America

Moon over Paria Movie Set at sunset, Grand Staircase-Escalante National Monument, near Page, Arizona, United States of America, North America

Organ pipe cactus (Stenocereus thurberi), Organ Pipe Cactus National Monument, Sonoran Desert, Arizona, United States of America, North America

Saguaro cactus (Carnegiea gigantea), photographed at sunrise in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America

Wotan's Throne from Cape Royal, north rim, Grand Canyon, Arizona, United States of America, North America

Grand Canyon viewed from the cliffs east of Moran Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America