Archaeologists excavating the ancient city of Teotihuacan in Mexico say they have uncovered evidence of what seems to be a network of secret tunnel located beneath the Pyramid of the Moon. The tunnel was discovered using electrical resistivity tomography—a geophysical technique for imaging subsurface structures from electrical resistivity measurements made at the surface, or by electrodes in one or more boreholes.

According to reports, the mystery tunnel stretches from the central square of the ancient metropolis which was most likely used for human sacrifices and other rituals, all the way to the Pyramid of the Moon.

According to INAH, the National Institute of Anthropology and History archaeologists used CT scans in order to find the tunnel located around 30 feet below the surface of the plaza near the Pyramid of the Moon.  Continue