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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Celebrating 54 years of Capitol Reef National Park
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Invisible no longer
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A bridge that rocks
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Clark Range, Yosemite National Park, California
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Celebrating whales—and a whale of a tale
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Taking the scenic route to Sturgis
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GOAL!
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A Carpathian Christmas celebration
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Anniversary of Pinnacles National Park, California
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Shining like Klondike gold
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Anybody out there?
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The glowing waters of the Matsu Islands
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Bridge to infinity
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World Rivers Day
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Acadia transformed
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Where the wildflowers grow
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Cypress trees in George L. Smith State Park, Georgia
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Take this for a spin...
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The tale of squirrels like Nutkin
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The Roaches ridge in the Peak District, England
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Buddha in the roots of a tree, Ayutthaya, Thailand
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National Museum of African American History and Culture
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Basking in the glow
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Waiting for winter
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International Day of the World s Indigenous Peoples
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Gem State views
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Hay, what s up?
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Signs of life in the Empty Quarter
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National Pearl Harbor Remembrance Day
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Brown bears, Katmai National Park and Preserve, Alaska
Bing Wallpaper Gallery

