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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Día de los Muertos celebrations in Mexico
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Ready. Set. Snow.
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This park is Superkilen
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Groovy!
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Celebrating World Wildlife Day
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Holi festival
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Pasadena Chalk Festival supports local arts education
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The monsoon arrives in the desert
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Winter in the Finnish wilds
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Spine-cheeked anemonefish in Milne Bay, Papua New Guinea
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Happy New Year!
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Taking the scenic route to Sturgis
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Village of Saranac Lake, New York
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The Cathedral of Florence, Italy
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World Bicycle Day
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Flying high on National Bird Day
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In the Himalayas for International Mountain Day
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Capitol Reef National Park, Utah
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Al-Khazneh in Petra, Jordan
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Dr. Martin Luther King, Jr. Memorial in Washington, DC
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Macro photograph of a migrant hawker dragonfly
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Daylight saving time
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Just another day in paradise
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Welcome to the Alien Egg Hatchery
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Celebrating Labor Day
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Construction workers resting above Manhattan
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What are we looking at?
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Whooper swans in Lake Kussharo, Japan
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La Geria wine region, Lanzarote, Canary Islands
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Earthrise on Moon Day
Bing Wallpaper Gallery

