* The Wari civilization was a powerful state that ruled over much of the Andes from the 6th to 10th centuries AD. They were skilled builders, architects, and engineers, and their empire was known for its efficient administration and extensive road network.
* The Inca civilization was the largest and most powerful empire in the Americas before the arrival of the Europeans. They ruled over a vast territory that stretched from present-day Ecuador to Chile, and their empire was known for its impressive engineering, architecture, and agricultural achievements.