Mexican archaeologists using ground-penetrating radar have detected underground chambers they believe contain the remains of Emperor Ahuizotl, who ruled the Aztecs when Columbus landed in the New World. It would be the first tomb of an Aztec ruler ever found.
The find could provide an extraordinary window into Aztec civilization at its apogee. Ahuizotl (ah-WEE-zoh-tuhl), an empire-builder who extended the Aztecs' reach as far as Guatemala, was the last emperor to complete his rule before the Spanish Conquest.
Accounts written by Spanish priests suggest the area was used by the Aztecs to cremate and bury their rulers. But no tomb of an Aztec ruler has ever been found, in part because the Spanish conquerors built their own city atop the Aztec's ceremonial center, leaving behind colonial structures too historically valuable to remove for excavations.
Sounds pretty cool. They mention the place being flooded and that it might contain organic remains. They're assuming it will contain a lot of grave goods, but because this is the first Aztec tomb found, who knows?
UPDATE: More here.