The Aztecs were the ones who lived on an Island in the middle of a lake. They didnt live in a jungle...that was the Maya. If you are a lost student looking for the Mayan website. Please go to chooseyourownmaya.com Thank you.  Back to the point. The Azteces live on an island in the middle of Lake Texacoco. This used to be what is now Mexico City. As you can see below the water seems to have dried up in the past few gazillion years. compare it the the Aztec city Tinochtitlan from back then.

See the difference? This is all the same land though. 

The Aztecs had very fertile soli, but not much of it to spare on the island. Naturally, they adapted to the land my clearing all the trees and other things out of their way before building the city.

 
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