Tenochtitlan was the capital city and center of the Aztec Empire. The city founded in 1325 and served as the center until it conquered by Spanish in 1520. The city was built on a swampy island in Lake Texcoco with pyramids, palaces, and storehouses. The Aztecs were able to settle there where the water served as a natural defense from enemies. The Aztecs build aqueducts, canals, and responsible for the development of a hydroponic form of irrigation. Hydrological had gates to control the flow of water from the lakes during the seasonal raining.
On the migration of the animals they were following. For example: If they are following Buffalo they will only leave the land when the Buffalo start to leave.
