How on earth would you feed a city of over 200,000 people when the land around you was a swampy lake? Seems like an impossible task, but the Aztec managed it by creating floating gardens known as chinampas, then they farmed them intensively.
GUATEMALA Tikal Guatemala - Founded in 200 B.C., it emerged as a regional superpower that dominated other city-states stretching from the Yucatán Peninsula to western Honduras. Tikal's reign abruptly ended when, for unknown reasons, the Mayans abandoned the city in A.D. 900. Enveloped by jungle, it would not be rediscovered until 1848. Since then, only 15 percent of the site has been excavated.