Inca Roqa street in Cusco, where I walked last year with Bob Newton, a fellow investigator. Talking about the special features on the wall. Bob giving his viewpoints on this, while I was filming. The video shows features like vitrification, the strange knobs, holes and structures made in the stones. And of course the amazing precision of the blocks fitting together. The conclusion of these stones having been soft once (like clay) is not so surprising if you have a good look at this video. Make your own conclusion!
