The Incas had an incredible system of roads. Since they lived in the Andes Mountains, it took great engineering and architectural skill to build the roads. Their cities were advanced. They had very efficient drainage and water supply system. A series of finely carved stone channels and basins carried water down through the mountain cities. The stone masons of the Inca Empire were very skilled, and they built marvellous shrines using stones.
The government of the Inca Empire was organized like a pyramid, with the emperor Sapa Inca at the top. The emperor was believed to be descended from the sun and was treated as a god.
The chief priest or Willaq Umu was the second to the emperor. The Incas had a council that comprised of 16 nobles. This council helped the emperor in administration. The Incas kept records of their administration by using knotted strings called quipu.