Nojpetén

Nojpetén was the capital city of the Itza Maya kingdom of Petén Itzá. It was located on an island in Lake Petén Itzá in the modern department of Petén in northern Guatemala. The island is now occupied by the modern town of Flores, the capital of the Petén department, and has had uninterrupted occupation since pre-Columbian times. Nojpetén had defensive walls built upon the low ground of the island, which may have been hastily constructed by the Itza at a time when they felt threatened either by the encroaching Spanish or by other Maya groups.

Source: Wikipedia