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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Guiding ships to safety
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The Door County Coastal Byway in Wisconsin
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Presidents hear the echo of history
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The Big Blue of the Sierra
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Christmas market in Leipzig, Germany
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A river on the tundra
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International Day of the Worlds Indigenous Peoples
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Can you see the family resemblance?
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Tulips, Netherlands
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In the belly of Fat Bear Week
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Bonifacio on the island of Corsica, France
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It s only Wednesday
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Celebrating Pi Day
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Groundhog Day
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Harvest season begins
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Patriot Day
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Happy World Meteorological Day
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Negratín Reservoir, Granada, Spain
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Welcome to the Alien Egg Hatchery
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Wild scene on the Merced River
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Bournemouth beach huts
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Celebrating 200 years of statehood
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Indigo bunting
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World Poetry Day
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The fishing village of Reine, Norway
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World Migratory Bird Day
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Classical music takes center stage
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Why you should thank a nurse today
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World Book Day
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Purple crocus flowers, Seven Rila Lakes, Bulgaria
Bing Wallpaper Gallery

