Archaeologists from the Lyobaa Project have confirmed a network of subterranean chambers and tunnels beneath Mitla  – The Zapotec “Place of the Dead”.

Mitla is an archaeological site associated with the Zapotec culture, located in the Oaxaca Valley in the present-day state of Oaxaca in southern Mexico.

The Lyobaa Project is a multidisciplinary research team led by the Mexican National Institute of History and Anthropology (INAH), the National Autonomous University of Mexico (UNAM), and the ARX Association for Archaeological Research and Exploration.

The team used advanced geophysical methods such as Ground Penetrating Radar (GPR), Electric Resistivity Tomography (ERT), and Seismic Noise Tomography, revealing a large void beneath the main altar at the Church of San Pablo Apostol at Mitla and a network of tunnels stretching in multiple directions.