MYTHS OF MEXICO AND PERU
origin still remains a mystery; but that they represent the remains of the capital of some mighty prehistoric kingdom is practically admitted.
A Strange Site
The greatest mystery of all regarding the ruins at Tiahuanaco is the selection of the site. For what reason did the prehistoric rulers of Peru build here? The surroundings are totally unsuitable for the raising of such edifices, and the tableland upon which they are placed is at once desolate and difficult of access. The snow-line is contiguous, and breathing at such a height is no easy matter. There is no reason to suppose that climatic conditions in the day of these colossal builders were different from those which obtain at the present time. In face of these facts the position of Tiahuanaco remains an insoluble riddle.
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 twentyseven 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
