Lamanai

The Mayan Ruia of Lamanai ("submerged crocodile" in Yucatec Maya) is a Mesoamerican archaeological site, and was once a considerably sized city of the Maya civilization, located in the north of Belize, in Orange Walk District. The site's name is pre-Columbian, recorded by early Spanish missionaries, and documented over a millennium earlier in Maya inscriptions as Lam'an'ain.

http://en.wikipedia.org/wiki/Lamanai