Mesoamerica region from central Mexico to Honduras and Nicaragua, where pre-Columbian societies flourished before the Spanish colonization.
The Valley of Mexico has plentiful supplies of water, fertile soil, lots of wild animal. This attracted the earliest settlers more than 10000 years ago.
Tenochtitlan was built in the middle of the lake because of a message from the Sun god, who told them to build a city where they see an eagle eating a snake while standing on a cactus.
The Aztecs empire was established in less than a century and covered thirty-eight provinces.