Project leader Sergio Gomez said researchers recently reached the end of the 340-foot (103-meter) tunnel after meticulously working their way down its length, collecting relics from seeds to pottery to animal bones.
A large offering found near the entrance to the chambers, some 59 feet (18 meters) below the Temple of the Plumed Serpent, suggests they could be the tombs of the city's elite.
"Because this is one of the most sacred places in all Teotihuacan, we believe that it could have been used for the rulers to ... acquire divine endowment allowing them to rule on the . . .
