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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Bavljenac Island
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An island hopper s paradise
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Ancient storage in the Grand Canyon
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Sligachan Old Bridge, Isle of Skye, Scotland
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Wildebeest on the move
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Palazzo Zuccari, Rome
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Sandhill cranes, Bosque del Apache National Wildlife Refuge
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Provence blooms with lavender at Sénanque Abbey
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Wild garlic in bloom at Hainich National Park, Germany
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Corn maze in Saylorsburg, Pennsylvania
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A keel-billed toucan in Costa Rica
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A festival of colors
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Black History Month
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National Dolphin Day
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Happy Mother’s Day
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National Hispanic Heritage Month
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Glass footbridge in Zhangjiajie, China
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Islands of the Salish Sea
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Wooden path to Kennedy Lake, Vancouver Island, Canada
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Desert rose of Qatar
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Cetacean Saturday
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Big Bend National Park turns 78
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Stari Most in Mostar, Bosnia and Herzegovina
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Aït Benhaddou, Morocco
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Preservation Hall in New Orleans, Louisiana
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Aloe in bloom
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A plot was afoot
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An avian predator built for the snow
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Gateway Arch in St. Louis, Missouri
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Churún Merú waterfall in Venezuela
Bing Wallpaper Gallery

