These are some of the achievements of the Inca empire
:
They managed to adapt cultivation terraces in the mountains to take advantage of most of the land to produce food.
They created irrigation systems and aqueducts.
They created musical instruments among which the flutes and drums are the most important.
They built roads and bridges that connected the different settlements.
They built cities of great architecture.
They created an accounting system based on ropes of different colors tied to a main cord. The number of knots, their position and their color gave specific information on product exchanges.
