Visiting Petra in 2016 was one of the most impactful trips of my life and my first exposure to a true ancient mystery. The scale is unimaginable. There are 12 major Greco-Roman looking sites in various stages of erosion, some look far older than anything in Egypt.The surviving architecture looks as if it were laser cut, but When you get close, the tool marks appear. Some are clearly hand chisels, some are too straight and perfect, some are the “scoop marks” we see all over the ancient world. The