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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An oceanic valentine
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Christmas comes to New York City
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It s International Jazz Day
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Autumn equinox
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Happy Pi Day!
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Jupiter and the Galilean moons
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Cetacean Saturday
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A wonderland in winter
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World Wildlife Conservation Day
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Northern coast of Colombia
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It’s showtime for a precious crop
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Illuminating Annecy
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Ringing in the new year at Teotihuacan
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An Alpine fairy-tale castle
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‘The memory of Abraham Lincoln is enshrined forever’
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World Octopus Day
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Mexico celebrates its Independence Day
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Prasat Phanom Rung temple ruins, Thailand
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Mid-Autumn Festival
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Abbey Gardens in Bury St Edmunds, England
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All eyes on sustainability
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A monastery in the mountain
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Rice processing in Bangladesh
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Greater flamingos, Lüderitz, Namibia
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Oud-West, Amsterdam, Netherlands
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A lofty lighthouse and a little ocean spray
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Books for children of all ages
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Lavender fields on the Valensole Plateau in Provence, France
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Sailing across the ice
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Yellowstone for the National Park Services birthday
Bing Wallpaper Gallery

