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
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A Welsh wonder turns 70
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Father s Day
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Exploring the Pearl of the Atlantic
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Our Lady of the Rocks
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Sounds of Bach come to Bath
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Mackerel forming a bait ball to avoid predators
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Pearl Harbor Day
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World of WearableArt Awards
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Looking down on the Otter
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Glen Brittle, Isle of Skye, Scotland
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When Death Valley blew its top
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Iceland awaits the Yule Lads
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A Carpathian Christmas celebration
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Rothenburg ob der Tauber, Bavaria, Germany
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Take the plunge into 2021
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Nuwara Eliya, Sri Lanka
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Rice terraces of Mù Cang Chải, Yên Bái province, Vietnam
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A visionary artist paints his own garden view
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Karlovy Vary, Bohemia, Czechia
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Basilica of Santa Maria della Salute, Venice, Italy
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A place fit for the gods
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Black History Month
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Ring of Brodgar, Orkney, Scotland
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Great Backyard Bird Count
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Zion National Park Turns 100
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National Park Service Founders Day
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Hey neighbor, it s World Space Week!
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Let s crack the code
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International Day of the Tropics
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The borrowed days are here
Bing Wallpaper Gallery

