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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Autumn in Central Park, New York
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Happy Valentines Day!
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A timeless view of the night sky
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It s World Bee Day
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A century since Tut s tomb was discovered
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World Children s Day
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Hay bales in North Yorkshire, England
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Iceland awaits the Yule Lads
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Wake up, it s Darwin Day
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Remembering the Arizona
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Fall Astronomy Week
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Hanging out on a limb
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Ad-Deir, Petra, Jordan
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Abraham Lake, Alberta, Canada
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Spine-cheeked anemonefish in Milne Bay, Papua New Guinea
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Pollinator Week
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Songkran—Thai New Year
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On the lookout for Sheep-Cote Clod
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The Guggenheim turns 60
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Rocks on the move
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Ceremony Hall at Sweden s Icehotel
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Capitol Reef National Park, Utah
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Happy Father s Day
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Albion Falls, Hamilton, Ontario, Canada
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European river otter, Netherlands
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Aït Benhaddou, Morocco
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International Tiger Day
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World Water Day
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Shark Fin Cove, California
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Lake Tekapo, New Zealand
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