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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Take the Stairs Day
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Freeze frame
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A rest stop for the birds
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Bobbio, Italy
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Camels at Jaisalmer, Rajasthan, India
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Ruins of a royal temple
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Mount St. Helens National Volcanic Monument, Washington
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Three Musketeers Falls at Iguazú Falls, Argentina
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1.1 billion opportunities for a better world
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National Trails Day
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Fall Astronomy Week
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Ancient art in the Amazon
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World Chocolate Day
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Valentines Day
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Ronda, Spain
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Edinburgh festivals
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Travel Sunday: San Francisco
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National Moth Week
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Cinco de Mayo
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The Battle of the Bulge 75 years later
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Just another day in paradise
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International Day of the Tropics
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Brooklyn Bridge Park in Brooklyn, New York
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Saffron in bloom
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Ravens
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Saint Andrews Day
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A cliffside harbor in Sardinia
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San Francisco Bay salt flats
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Aerial view of a heart-shaped field in Trittau, Germany
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Two rocks and a heart spot
Bing Wallpaper Gallery


