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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Travel Sunday: Flamenco in Granada, Andalusia, Spain
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A personal collection becomes an institution
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Spreadsheet Day
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World Turtle Day
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Is that a face in the sand?
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‘The memory of Abraham Lincoln is enshrined forever’
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The dry days of winter in Etosha
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Glendurgan Garden hedge maze is 186 years old
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Life goes on at the Beatles Ashram
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Goliath heron in Kruger National Park, South Africa
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World Theater Day
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Black History Month
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Decorating for Diwali
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Chaco Culture National Historical Park, New Mexico
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A species no longer at risk
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Petrified Forest National Park
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Beech trees and wild anemones, Jutland, Denmark
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National Take a Hike Day
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A Carpathian Christmas celebration
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Happy Thanksgiving!
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Wild turkeys in repose
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Kiteboarding and windsurfing in Croatia
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May the Fourth be with you…
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Tough turf
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Land ho in New Zealand 250 years ago
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Mountain hare hopping into Lunar New Year
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Freeze frame
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International Geodiversity Day
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A new park with a new mission
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Easter