Straddling the border between Peru and Bolivia is Lake Titicaca, the world’s highest navigable lake. Its surface elevation sits at 3800 m (12,500 ft), which is 21 times higher than that of Lake Superior. Gregor and I have seen plenty of high-altitude lakes on our mountaineering trips, but never one as high as Lake Titicaca. We were looking forward to seeing this famous lake with our own eyes. (more…)