This famous citadel combines the visual and spiritual force of magnificent natural scenery with the natural diversity of a historic sanctuary, recognised as a Cultural and Natural Patrimony of the World. Machu Picchu is a sacred city or sanctuary because only the Inca and his noblemen, priests, priestesses and chosen women (Akllas) had free access to its premises. The ruins are situated on the eastern slope of Machu Picchu in two separate areas - agricultural and urban. The latter includes the civil sector (dwellings, canalisations) and the sacred sector (temples, mausoleums, squares, royal houses).