This photo clearly shows the route from the base camp to the high camp of Sajama. One could easily make the trip from the town of Sajama to the high camp in one day -- or from the base camp to the summit in one day -- if the altitudes weren't so extreme. The base camp is a 30-minutes walk from this shot (on similar terrain), and the high camp is located just under the... parallelogram-shaped (thanks, Tom!) rock on the ridge-line. Granted, in this photo it looks more like a triangle.