Lake Peipus, the fifth-largest lake in Europe, dates back hundreds of millions of years to the Paleozoic Era and is known for its sand dunes, which can "sing" when the wind blows just right. In the winter the frozen lake surface may feature ice hummocks, as seen in this image. The hummocks are caused by slow, uneven pressure in the ice pack.
Lake Peipus, Estonia
Today in History
More Desktop Wallpapers:
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Happy Astronomy Day!
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The Badlands celebrates a milestone
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Mount Sopris, Colorado
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Canada Day
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Christmas Eve
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What kind of bird laid these eggs?
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Autumn in the Prosecco Hills
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Flying high on National Bird Day
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An improbable tribute for Towel Day
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Winter in the Wild West
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The last thing seen by Wile E. Coyote
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Seville, Spain
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Blackbird in Essex, England
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From garden to table?
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The confluence of the Arve and Rhône Rivers
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Devetashka Cave, Devetaki, Bulgaria
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White Sands National Park turns 90
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Shi Shi Beach, Olympic National Park, Washington
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Protecting Alaska
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National Go Birding Day
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World Rivers Day
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Hippo family in Chobe National Park, Botswana
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Presidents Day in America’s front yard
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Clouds over the River of Grass
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Edinburgh Art Festival
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Vacuum Chamber 5 at Glenn Research Center
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Shark Fin Cove, California
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Aloe in bloom
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Exploring the Pearl of the Atlantic
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East River crossing