The Andes, the high mountain spine of South America and its adjacent coast, running through Peru, Bolivia, and Ecuador, developed a religious culture shaped, more than almost any other, by altitude and landscape. Long before the Inca, Andean peoples venerated the mountains themselves: the great peaks were apus, powerful living deities and ancestors who controlled weather, water, and fertility, and to whom offerings, including, at the highest and most sacred summits, human sacrifices, the capacocha, whose frozen remains have been recovered by archaeologists, were made. The whole landscape was sacred and alive, its springs, caves, rocks, and shrines (huacas) linked in ritual lines (ceques) radiating from the Inca capital of Cusco.
Over this ancient substratum the Inca built an imperial state religion centred on the sun god Inti, from whom the ruling Sapa Inca claimed descent, and on the creator Viracocha and the earth mother Pachamama, the last of whom, along with the mountain apus, is still honoured across the Andes today. Andean religion had no writing (records were kept on the knotted-cord quipu) and centred on reciprocity between humans, the ancestors, the earth, and the mountains. Though the Spanish conquest imposed Catholicism, the old worship persisted in fused form, and the veneration of Pachamama and the sacred mountains remains a living current of Andean spirituality.