Quebrada de la Vaca, also known as Puerto Inca, located in Atiquipa, is the only Inca site built from stone to be found anywhere on the Peruvian coast. Puerto Inca features chullpas (funerary structures), colcas (storage buildings), ceremonial squares, and dwellings, and is believed to have been the point of departure for the fish taken to Cusco for the Inca emperor. The road followed the Qhapaq Ñan, or Inca Trail (running parallel to part of Peru’s modern coastal highway), which linked together the coastal valleys and areas where fish and other marine species were caught. The ascent to Ayacucho and Cusco passes through inter-Andean valleys before reaching the puna, or high mountain grassland, with an immensely diverse “altitudinal zonation,” or changes in biodiversity depending on elevation. Quebrada Verde, near the pre-Hispanic trail from Arantas to Matarani, offers more evidence of ancient humans’ occupation of the Arequipa coast. Some of these sites were inhabited continuously during various periods until they were conquered by the Incas. Between kilometer markers 591 and 625 of the Panamericana Sur highway, a 22-kilometer (13.5-mile) stretch of the pre-Hispanic coastal trail has withstood the ravages of time.