In 1891, the American geologist and antiquarian William Niven set off on a journey of discovery and exploration through the Mexican state of Guerrero. What he found would change the course of his life forever. He did not just discover a lost city, but the evidence of a civilization that thrived in the unexplored highlands of Guerrero long before the time of the Aztecs, the Maya and the Olmecs. [[{"type":"media","view_mode":"media_large","fid":"67462","attributes":{"alt":"One of very few pictures of the ruins discovered by Niven at Omitlán shows a large temple platform built of small carved stone blocks (note person in the foreground for scale) Mediateca INAH","class":"media-image","height":"444","style":"width: 610px; height: 444px;","typeof":"foaf:Image","width":"610"}}]] One of very few pictures of the ruins discovered by Niven at Omitlán shows a
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