Ollantaytambo is an ancient megalithic site in the Sacred Valley of Peru that seems to have been heavily damaged by some cataclysmic event. In this video you will see evidence that the later Inca people found the ruins here, made with Lost Ancient High Technology and reconstructed it; MUCH later.
It is detailed in my new book, AFTERSHOCK, available at amazon.com:
https://www.amazon.com/Aftershock-Ancient-Cataclysm-Erased-History/dp/1534907106/ref=sr_1_2?ie=UTF8&qid=1467019992&sr=8-2&keywords=brien+foerster+aftershock