Short inca trail to pisaq archeological site the sacred valley of the incas was undoubtedly a key area of settlement to the incas its pleasurable climate and fertile plains make a rare and fruitful combination for the high andes the sacred valley was also the route to the jungle therefore an area with access to the fruits and plants of the tropical lowlands and served as a safeguard zone protecting cusco from incursions of the fierce jungle tribes full day tour sacred valley of the incas