The canals and raised fields of La Mojana during wet season. (Nicolás Jiménez / ICANH via SWNS)
Early farmers achieved an "engineering wonder of the world" by building a giant irrigation system in South America thousands of years ago.
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Archaeologists from the Colombian Institute of Anthropology and History (ICANH) recording an excavated section of a pre-Hispanic canal-ridge formation. (ICANH via SWNS)
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(Nicolás Jiménez / ICANH via SWNS)
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(Nicolás Jiménez / ICANH via SWNS)
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(Nicolás Jiménez / ICANH via SWNS)
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