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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American bison
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Pride Month
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Midsummer in Sweden
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A sleeping green giant
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Santo Antão Island in the Republic of Cabo Verde
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A Carpathian Christmas celebration
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Spread some love with Bing
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Spiegelgracht canal in Amsterdam, Netherlands
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Hidden beauty in Thailand
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Kiteboarding and windsurfing in Croatia
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Celebrating 54 years of Capitol Reef National Park
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Staring down winter
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World Meteorological Day
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Birds of the Drömling
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Let the holiday shopping commence
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Roques de Benet, Els Ports Natural Park, Catalonia, Spain
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Lanterns alight in Pingxi
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A universe underground
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Dark skies over New Mexico
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Whale hello there!
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Raise your hand for Teacher Appreciation Day
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Fashion models of the avian world
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Here’s why landmarks are going dark
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San Gimignano, Siena Tuscany, Italy
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Patriot Day
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Welcome to the pack
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It s tree-climbing season
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Lunar eclipse
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A black heron canopy feeding in Botswana
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Winter in England s Cotswolds
Bing Wallpaper Gallery

