(PRE-)INCA RUINS (PERU AND BOLIVIA). Join Researcher David Hatcher Childress and British Engineer Christopher Dunn as they journey to Cuzco in the Andes Mountains to examine evidence for the possible use of advanced rock-machining techniques. Going to ancient cities and megalithic quarries, they again examine saw marks, advanced lifting and moving techniques, as well as evidence of Pre-Incan megalith builders at Machu Picchu and Ollantaytambo.

http://youtu.be/pGW0-wYo48E