The same Garcilaso wrote that in his childhood he used to visit and play in this spot, that was a very complex and broad labyrinth because of the existing amount of underground passages and doorways. He indicated that it was necessary to have the help of a guide for its visit or the use of a ball of yarn which tip was tied to the entrance; like this a person could get out guided by the yarn. Originally there were three "walls" or "bulwarks" which foundations are still seen today; they are the most spectacular remains of that fabulous building that according to chroniclers did not have any comparison in the old world. They are three parallel walls built in different levels with limestones of enormous sizes; zigzagging walls that because of their appearance it is suggested that they represent the "teeth" of the puma's head that the complex represented. The boulders used for the first or lower levels are the biggest; there is one that is 8.5 mts. high (28 ft.) and weights about 140 metric tons. Those boulders classify the walls as being of cyclopean or megalithic architecture. Some authors believe that the three walls represent the three levels of the Andean Religious World: beginning from the bottom would be the Ukju Pacha (underground stage), the Kay Pacha (earth's surface stage) in the middle, and the Hanan Pacha (sky stage) on the top. Besides; those levels are identified with their three sacred animals: the Amaru or Mach'aqway (snake), the Puma (Cougar or Mountain Lion), and the Kuntur (Andean condor). Because of the zigzagging shape of the walls, some authors suggest that they represented the Illapa god (thunder, lightning and thunderbolt). It is possible that all the previous elements related to their religion would not be excluding, because there are divine interactions, and as it is known "three" was a key number among Quechuas.