what is a machu picchu used for?
But the best guess is some kind of priests’ city. Thus, it’s primary use nowadays is making tourist bucks for the Peruvian goverment. “One of Machu Picchu’s primary functions was that of astronomical observatory.” The place is quite the archeological find, but the utter absence of inhabitants–or local residents’ memory of or knowledge of the place–make it quite the mystery. While the language is well-enough known, the site below so quickly devolves into “spiritual” guess work that it betrays the real answer: no one knows. Sources: http://www.sacredsites.com/americas/peru/machu_picchu.