Antelope Canyon, Arizona
Photograph by Paul NicklenSunlight sneaks through a crevice in Antelope Canyon near Page, Arizona.
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Matanuska Glacier, Alaska
Photograph by Rich ReidMatanuska Glacier is reflected in a glacial lake in Alaska's Matanuska Valley.
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Sossus Vlei, Namibia
Photograph by Cary WolinskySand dunes loom at Sossus Vlei in Namibia's Namib Desert.
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Forest Fire Flames
Photograph by Raymond GehmanA wall of flames from a forest fire partially obscures the sun in the western U.S.
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Terraced Hill
Photograph by Sylvia SharnoffBlossoms soften a hill terraced by cattle trails in California’s Briones Regional Park.
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Dallol Volcano, Ethiopia
Photograph by Carsten PeterSulfur, salt, and other minerals color the crater of Ethiopia’s Dallol volcano.
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Danakil Desert, Ethiopia
Photograph by Carsten PeterScorching temperatures—sometimes topping 120 degrees Fahrenheit (49 degrees Celsius)—crack the earth in Ethiopia's Danakil Desert.
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Arizona Canyon Mud
Photograph by Bill HatcherMud tracks ripple like melted chocolate after a flood washed through a slot canyon in Arizona.
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Whitebark Pine Bark
Photograph by Marc MoritschThe bark of whitebark pine (Pinus albicaulis), found in the western U.S. and Canada, appears striated.
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White Birch Trees
Photograph by Medford TaylorWhite birch trees stand tall in Riding Mountain National Park, in Manitoba, Canada.
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