Final answer:
Machu Picchu had multiple functions including being a royal retreat, having numerous temples, ceremonial and practical water features, terraced land for farming, and an advanced drainage system.
Step-by-step explanation:
Machu Picchu, located in Peru, served multiple functions during the time of the Incas. It was a royal retreat for Incan royalty, where they would go to relax and escape from their main city. The city also had numerous temples, indicating its religious importance. It had ceremonial and practical water features and fountains, which were used both for ceremonial purposes and for practical needs such as water supply. Additionally, the terraced land in Machu Picchu was used for farming, and the city had an advanced drainage system to manage water flow.