Clouds and fog, Big Sur, California.
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Grand Prismatic Spring, Yellowstone.
Tufa towers, Mono Lake, California.
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Oscellated turkey feathers, San Antonio Zoo.
Autumn oak leaves, Yosemite.
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Ibex Dunes, Death Valley, California.
Mountain lion, Arizona-Sonora Desert Museum.
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Cuernos de Paine, Chile.
Dawn in a Florida pine forest.
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Sunset, Bosque del Apache, New Mexico.
Virgin River Canyon, Zion National Park, Utah.
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Storm waves, Monterey Peninsula, California.
Ferruginous hawk feathers (a wild bird), California.
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Barrel cactus flowers, California.
Wall Street formations, Arches National Park, Utah.
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Sumatran tiger, San Diego Safari Park.
Blue-eyed darner dragonfly, California.
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Mountain peacock-pheasant, San Diego Zoo.
Towers of the Virgin, Zion National Park, Utah.
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Thunderstorm, Two Peoples Bay, Western Australia.
Common poorwill (a wild bird), California.
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Rodent tracks, Coral Pink Sand Dunes, Utah.
Cholla garden, Joshua Tree National Park, California.
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Snow geese and rainbow, Bosque del Apache, New Mexico.
Eight-spotted skimmer, Idaho.
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Eroded red sandstone, Arches National Park, Utah.
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