The term 'Machu Picchu Dweller' refers to an INCA, which is a four-letter word. The INCA were the largest pre-Columbian civilization in South America, located in what is now Peru. They were a powerful and influential empire that flourished from the 12th to 16th centuries. The INCA built many impressive monuments, including Machu Picchu, which was declared a UNESCO World Heritage Site in 1983. The INCA were known for their advanced engineering, architecture, and agricultural techniques, as well as their complex social and religious systems.