On the National Park Service"s Founders Day, we"re here on the North Rim of Grand Canyon National Park in Arizona peering out at the stunning vista. Can you see the rectangular hole in the canyon wall near the top of the image? That"s Angels Window. Brave hikers can make their way up to the trail above it, but the window itself is best viewed from various points along the North Rim. Far down below is the Colorado River. Beginning about 6 million years ago, it gradually carved downward through countless layers of sedimentary, igneous, and metamorphic rock. The Colorado and its tributary streams continue to deepen and widen the Grand Canyon even today.
Happy anniversary to the National Park Service!
Today in History
More Desktop Wallpapers:
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White Sands National Park turns 90
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International Tiger Day
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A march toward a dream
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The long and wiggling path
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Extraterrestrial Culture Day
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1, 1, 2, 3: It s Fibonacci Day!
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Marseille welcomes the Olympic torch
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World Migratory Bird Day
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National Frog Month
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Reflections on the mighty Amazon
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Moose, Denali National Park, Alaska
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Assembling the Smithsonian
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World Architecture Day
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New Year’s Day in the land of the rising sun
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National Fossil Day
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It s leap day!
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Nesting season for the leatherbacks
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Union Square, Manhattan
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Celebrating women in science
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A day of service for Dr. King
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Wild turkeys in repose
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Northern cardinal in winterberry bush
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Porcupine
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World Whale Day
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Black History Month
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National Park Week: Everglades National Park
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One for the books
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Fire-damaged forest near Wolf Creek Pass, Colorado
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International Mountain Day
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Big Bend National Park anniversary
Bing Wallpaper Gallery

