Route 40 runs alongside the Andes from la Puna until reaching the Glaciers of the South. It is mythical for many reasons. For the solitary stretches it crosses. For the peaks of the Andes that guard the route like centennials. And also because its plan corresponds with the ancient travel routes of the first inhabitants of South America. These wise ancestors were knowledgeable about all of the different microclimates where a traveler could find fresh water supplies, the resource which enabled the development of the cities and towns of today.