Declared a Peruvian Historical Sanctuary in 1981 and a UNESCO World Heritage Site in 1983; Machu Picchu is a place of history and mystery, built in the 15th century. An Incan citadel set high in the Andes Mountains just above the Urubamba River valley, it is a sight to behold. Although abandoned in the past, this building is renowned for its polished dry-stone walls, panoramic views, and intriguing buildings, including the Intihuatana, the Temple of the Sun, and the Room of the Three Windows.
The ancient ruins continue to reveal the mysteries of the Inca empire, but its exact former use remains a mystery. Although, most archaeologists believe that Machu Picchu was constructed as an estate for the Inca emperor Pachacuti.