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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Badlands National Park in South Dakota
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The Twin Cities celebrate Pride
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On the wings of the Wright brothers
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Winterpret on ice
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A night of art and culture
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World Olive Tree Day
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Earthrise on Moon Day
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Let the games (finally) begin!
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Happy Independence Day!
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On this shore, history was made
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Everest s shadow on the Himalayas
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Glowworm caves in Australia
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World Migratory Bird Day
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April Fools Day
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Sequoia National Parks 134th anniversary
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Penguins can t fly!
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Aw shucks, It s Oyster Day
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National Park Week
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A peek at an explosive peak
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It s a ruff life
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Santorini, Greece
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A meerkat stands alone
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Last day of National Park Week
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In the Supertree Grove
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It’s Siblings Day!
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A notorious gunfight that was incorrectly named
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For Hispanic Heritage Month: Out of Many, One
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Cousins Day
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The tallest animal in the world on the longest day of the year
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Happy Thanksgiving!
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