The ancient ruins of the Inca can be found at Ollantaytambo, where you can see some of the amazing work of these master stonecutters and engineers, who were able to not only carve giant boulders but also move them at will from one location to another with seeming ease. Today's engineers even have a difficult time fathoming how the ancient Inca, with their limited tools, could design ways to move these giant boulders.