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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A delta in the Venetian Lagoon, Italy
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Big Bend National Park anniversary
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Celebrating the Acadians
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Asteroid Day
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Find a Rainbow Day
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A rest stop for the birds
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Sea lion in a kelp forest, Baja California, Mexico
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Black History Month
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Ocean City, Maryland, at sunrise
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Trevi in bloom
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Big dreams require a big sleigh
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Rockefeller Center Christmas tree lighting
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Sandhill cranes, Bosque del Apache National Wildlife Refuge
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When Death Valley blew its top
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Al-Khazneh in Petra, Jordan
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Brocken spectre in Central Balkan National Park, Bulgaria
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Siblings Day
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Skagit Valley Tulip Festival
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World Art Day
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Under Parisian skies
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Of balloons and lost pantaloons
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To Roswell, and beyond!
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Over the boardwalk
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Atolls in the Maldives
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San Francisco Bay salt flats
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A hit ballet, long after its debut
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Seitan Limania Beach, Crete
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A castle fit for a count
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Thomas Jefferson Memorial, Washington, DC
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Vineyards in the Mosel Valley, Rhineland-Palatinate, Germany
Bing Wallpaper Gallery

