The Incas had a widespread empire with a number of tribute tribes. And yes, it helped that they did not consider their neighbors their “bread” and eat them. Nevertheless, when the Spaniards decided to conquer them and steal all their gold, it is thought that this site was used as a last hidden retreat.
My mother went there when she was in her 70s, I am not sure exactly how she got there, but she was a tough old bird. ;-)
Thanks gleeaikin!