The correct answer is to this open question is the following.
The great Aztec Empire built its capital city of the Texcoco lake. The name of the city was Tenochtitlan. They used advances engineering techniques to build "Chinampas," portions of land communicated through water channels that connected Tenochtitlan City with other close towns such as Tlatelolco (the biggest market place in Mesoamerica), or the town of Mixcoatl, in the south. They used mud, wood and rocks to make solid "Chinampas" where Aztecs lived and worked on agriculture.
By 1500, the Aztec Empire stretched from the Pacific Ocean
to the Gulf of Mexico, controlling 28 million people. By then, Tenochtitlan and
other nearby islands has fused into one great capital city, with an estimated population
of 400,000. They constructed a system of dams and aqueducts to control
lake levels and bring in fresh water from the mainland to supplement the
springs on the islands since then all else follows like their source of food
through the system of hydraulic agriculture, draining swampland and creating
artificial islands to grow food for the city. Making their civilization a successful
one.
