National Geographic : 1927 Feb
HIGH LIGHTS IN THE PERUVIAN AND BOLIVIAN ANDES (g)National Cteograplic society autocnrome ny w. ooert Mioore NAVIGATION TWO-AND-A -HALF MILES ABOVE THE SEA Titicaca is the highest large lake in the world and these Indian balsas are the principal craft that ply its chilly waters. Their hulls are made of bundles of dried bulrushes, tightly fastened together and turned up at the ends. The sails consist of mats of the same material. Due to the fact that nearly all lumber in this region comes from distant places, many of the masts are made by splicing small pieces of wood together. Balsas quickly become water-logged and must be hauled ashore frequently to be dried out.