Recent archaeological investigations at Mitla, a significant Zapotec site in Oaxaca, Mexico, have confirmed the existence of a vast network of subterranean chambers and tunnels. Using advanced geophysical technologies, including ground-penetrating radar, electric resistivity tomography, and seismic tomography, the team from ARX Project Lyobaa has provided the first solid evidence of what was long suspected: a hidden underground labyrinth that may have served as a gateway to the Zapotec underworld. Installing electrode plates for Electric Resistivity Tomography (ERT) scan of the Calvario Pyramid. (© Marco M. Vigato/ Arx Project) Mitla: A Ceremonial Hub of the Zapotecs Mitla, located in the central valley of Oaxaca, 40 kilometers (25 miles) southeast of Oaxaca City, was a ceremonial center for the Zapotec civilization. After the fall of Monte Albán around AD 750, Mitla emerged as the new religious and political capital. It reached its architectural zenith between the 8th and 15th centuries AD. Read moreSection: NewsHistory & ArchaeologyAncient PlacesAmericasRead Later