Sacsahuaman and Ollantay
Other remains of these prehistoric people are found in various parts of Peru. At Sacsahuaman, perched on a hill above the city of Cuzco, is an immense fortified work six hundred yards long, built in three lines of wall consisting of enormous stones, some of which are twenty-seven feet in length. Pissac is also the site of wonderful ruined masonry and an ancient observatory. At Ollantay-tampu, forty-five miles to the north of Cuzco, is another of these gigantic fortresses, built to defend the valley of the Yucay. This stronghold is constructed for the most part of red porphyry, and its walls average twenty-five feet in height. The great cliff on which Ollantay is perched is covered from end to end with stupendous walls which zigzag from point to point of it like the salient angles of some modern fortalice. At intervals are placed round towers of stone provided with loopholes, from which doubtless arrows were discharged at the enemy. This outwork embraces a series of terraces, world-famous because of their gigantic outline and the problem of the use to which they were put. It is now practically agreed that these terraces were employed for the production of maize, in order that during a prolonged investment the beleaguered troops and country-folk might not want for a sufficiency of provender. The stone of which this fortress was built was quarried at a distance of seven miles, in a spot upwards of three thousand feet above the valley, and was dragged up the steep declivity of Ollantay by sheer human strength. The nicety with which the stones were fitted is marvellous.