Chinampas were a marvel of engineering that allowed the Aztecs to literally create new farming land where there was none before.

The Aztecs built an expansive system of aqueducts that supplied water for irrigation and bathing.

Though they could build complex suspension bridges, the Aztecs could not ward off diseases brought over by the Spanish.

Paleo-Indians are believed to be the first humans to populate the Americas, around 10,000 B.C.