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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The mighty, mighty mushroom
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A wonderland in winter
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Celebrating 30 years of eye-opening images
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Rice processing in Bangladesh
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Let s run em up!
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Evidence of human habitation
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Darwin Day
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A big place to shop small
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Ocracoke Lighthouse on Ocracoke Island, North Carolina
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The Door County Coastal Byway in Wisconsin
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Union Square, Manhattan
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Lavender fields in Plateau de Valensole, France
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Swimming with the sea cows
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Yungang Grottoes, Shanxi, China
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Cinco de Mayo
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Springtime in the Mediterranean
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National Frog Month
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Winter in Old Nuuk
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Shi Shi Beach, Olympic National Park, Washington
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Tolkien Reading Day
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Blue walls of Chefchaouen, Morocco
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Cranborne Chase, England
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Sky island views
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Harbin International Ice and Snow Sculpture Festival, China
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A glittering diamond in the rough
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Nubble Island’s only industry
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Devils Tower National Monument, Wyoming
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Let the games begin
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Ring-tailed lemur
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World Space Week
Bing Wallpaper Gallery

