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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Tennis in the park
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Black grouses lekking
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Brocken spectre in Central Balkan National Park, Bulgaria
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Lucian Blaga National Theater, Cluj-Napoca, Romania
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Methow Valley, North Cascades, Washington
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Clouds over the River of Grass
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National Museum of African American History and Culture
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Alaska Day
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National Hispanic Heritage Month
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Aerial view of Plaza Mayor, Madrid, Spain
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American bison
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Illuminated Uluru
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Bright and colorful peacock feathers
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World Rainforest Day
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Big dreams require a big sleigh
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Siblings Day
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Spring equinox
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Happy New Year! (Again!)
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Inside the Oculus
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A seabird gets schooled
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Hungarian Parliament Building, Budapest, Hungary
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World Migratory Bird Day
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A picture-perfect day on Trillium
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American Wetlands Month
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Rice processing in Bangladesh
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World Elephant Day
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World Numbat Day
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My my, it s Syttende Mai
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Ribblehead Viaduct, North Yorkshire, England
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50 years of World Heritage Sites
Bing Wallpaper Gallery

