Sand and Water
In the Sahara, an ancient pool of water makes life possible. It also harbors incredible danger. Visit the Guelta Archei, a place full of life in the middle of the sandy Sahara.
In the Sahara, an ancient pool of water makes life possible. It also harbors incredible danger. Visit the Guelta Archei, a place full of life in the middle of the sandy Sahara.
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Photographs: © Mark Thiessen/National Geographic Photographer