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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Greetings from Asbury Park
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Bonifacio on the island of Corsica, France
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A hit ballet, long after its debut
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Rocky mountain pi
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Halfway Day
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Rice processing in Bangladesh
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Okefenokee Swamp
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International Haiku Poetry Day
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Happy birthday to Crater Lake National Park
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World Oceans Day
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Shadows on the solstice
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Snowy egret preening, central Florida
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March of the flowers
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A unique elephant encounter in Nantes
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For the love of bikes
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Endangered Species Day
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A star is borne by seaweed
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A Welsh wonder turns 70
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Protecting wildlife today and tomorrow
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Looking back at Yellowstone, 30 years after the fires
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Wild and beautiful Alaska
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Happy Pi Day!
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Celtic Colours International Festival, Canada
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All is silent for Big Ben’s musical milestone
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Why does this panda cub look so happy?
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Whitehaven Beach, Whitsunday Island, Australia
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Redwood National and State Parks, California
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Grasmere, Lake District, Cumbria, England
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Bernina Pass, Graubünden, Switzerland
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Alstrom Point, Lake Powell, Utah
Bing Wallpaper Gallery

