Rio Negro, Brazil (natgeo)


Photograph by George Steinmetz, National Geographic

This Month in Photo of the Day: Nature and Weather Photos
Water dark with tannin inspired the name Rio Negro, or "black river," which swirls across virgin sand in Lençóis Maranhenses National Park. In the park's ponds, thriving communities of algae can turn the water blue or green.
See more pictures from the July 2010 feature story "A Sea of Dunes".

About the Author

Pilgrim / Author & Editor

Has laoreet percipitur ad. Vide interesset in mei, no his legimus verterem. Et nostrum imperdiet appellantur usu, mnesarchum referrentur id vim.

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