Lost CivilizationsOmitlàn: In Search of a Lost City in Mesoamerica Posted on May 19, 2025 by Administrator 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.
