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
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Weaverbird nests at Kenya’s Samburu National Reserve
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‘You should see the one that got away!’
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League of Nations, 100 years later
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China s colorful terraced pools
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Ski touring in Austria
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Take the Stairs Day
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Abraham Lake, Alberta, Canada
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The Matterhorn reflected in Lake Stellisee at sunrise, Zermatt, Switzerland
More Desktop Wallpapers:
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National Mushroom Month
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Red fox, Grand Teton National Park, Wyoming
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Craig Goch Dam in the Elan Valley of Wales
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Cousins Day
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It s Independence Day
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San Francisco Bay salt flats
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Celebrating whales—and a whale of a tale
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Detroit Industry Murals by Diego Rivera
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It s National Camera Day. Get the picture?
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An island hopper s paradise
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Ubud, Bali, Indonesia
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Salt evaporation ponds on the island of Gozo, Malta
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International Mountain Day
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Field of Light at Sensorio by Bruce Munro
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World Elephant Day
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Let s get lost
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World Octopus Day
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Gamboa Crater, Mars
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Mendenhall Glacier, Alaska
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Moselle River loop near Kröv, Germany
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1953 Mount Everest Expedition
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The Giants Causeway, Northern Ireland
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Celebrating the UN’s International Day of Families
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A goldie gala
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Happy 50th for the National Trails System!
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Goliath heron in Kruger National Park, South Africa
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Mid-Autumn Festival
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Of balloons and lost pantaloons
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‘Ocian in view! O! The joy.’
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A lofty lighthouse and a little ocean spray
Bing Wallpaper Gallery

