The Incas lived in a mountainous area of land in what is now modern day Chile in south america. The Incas also adapted by building stone houses with straw, and stone from the mountains. The Incas also built an advanced irrigation system alongside their villages.
The Inca's version of human sacrifices was to raise young children as young as when they are five and take them to the capital. These people were called the virgins of the sun. when they were ready they would climb a mountain and die.
When of A man by the name of Pizarro wich was a Spanish explorer looking for gold in the Americas. He took the leader of the Incas and forced the Incas to bring him large amounts of gold. When Pizarro left he left a disease called smallpox and killed the Inca population.