Today"s photo brings us to the banks of Caño Cristales, the "liquid rainbow" that cuts a prismatic path through the heart of Colombia. From June through November, when the clear water is low, the abundant underwater plants that cover the riverbed show off their red, yellow, green, and blue hues. The star of the show—especially in this photo—is Macarenia clavigera, a riverweed that ranges from bright red to deep crimson or purple depending on its intake of sun rays. In August and September, when the florid flora is at its peak, the river"s a coveted nature excursion: Because the ecosystem is so fragile, visits are limited to guided tours.
Go with the rainbow flow
Today in History
More Desktop Wallpapers:
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Sligachan Old Bridge, Isle of Skye, Scotland
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North Sea at sunset, Norddorf, Germany
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Royal Alcázar of Seville, Spain
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Glenariff Forest Park, Northern Ireland, UK
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Rock River Falls, Upper Peninsula, Michigan
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Jöriseen lakes in the Silvretta Alps, Switzerland
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Glacier Bay National Park and Preserve
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National Bison Day
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Mysterious prairie mounds abound
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Hang Sơn Đoòng Cave, Vietnam
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What kind of bird laid these eggs?
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Manhattan
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Mountains fit for a queen
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Summertime in Alaska
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Wildebeest on the move
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Where the bearded reedling sings
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Val Gardena, South Tyrol, Dolomites, Italy
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Mont-Saint-Michel
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Quiver trees in Namibia
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Petroglyphs near Fruita in Capitol Reef National Park, Utah
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Regional Park of Migliarino, San Rossore, Massaciuccoli, Italy
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Bask in the glow—It s World Turtle Day
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Cenote near Puerto Aventuras, Mexico
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Necropolis of Dargavs
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Who left the tub running?
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A tribute to the ancestors
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Dog days of summer
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World Population Day
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It s superb owl Sunday
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A reflection of Europe s past
Bing Wallpaper Gallery

