Come on down to the civilizations of Mesoamerica.
Incas: The Incas had to cut into the mountains to get most of their land to farm. They usually grew corn and potatoes.
Aztecs: The Aztecs built artificial gardens and fields out on the lake. They grew corn, coco beans, and squash.
Incas: The Incas came up with many effective ways to cure illnesses. They were the first ever people to complete a successful brain surgery.
Aztecs: The Aztecs were really good a making water ways. They also came up with books and two calendars. One for farming and one for religion.
Incas: They were great at medicine and building. They also used a lot of gold in their art work.
Aztecs: They were great at building and made temples, city walls, they made gold beads, poetry, stone urns, and feather head dresses.