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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Point Reyes National Seashore, California
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Sailing on thick ice
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National Park Week: Guadalupe Mountains National Park
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World Water Day
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Trunks stick together
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World Frog Day
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We heart Berlin
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Sydney Harbour, New South Wales, Australia
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Male kori bustard, Maasai Mara National Reserve, Kenya
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Mod gear
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Mid-Autumn Festival
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Sutherland Falls in Fiordland National Park
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In praise of the pipes
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International Tea Day
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Miravet, Catalonia, Spain
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Presidents Day
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The Tour de France begins
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The (Inca) empire strikes back
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Computer Science EDU Week
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International Day of Friendship
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Aït Benhaddou, Morocco
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Birds of the Drömling
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The ruins of Italica, Andalusia, Spain
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White trilliums blooming in Ontario, Canada
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A snuggling ball of cute
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Celebrating Bike to Work Week, May 14-18
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Everest s shadow on the Himalayas
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Zion National Park turns 103
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There’s a dog in there somewhere
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Darwin Day
Bing Wallpaper Gallery

