Lake Titicaca, situated at an altitude of 3,812 metres and straddling the border between Peru and Bolivia, is fifteen times the size of Lake Constance. It fills a tectonically formed highland depression, is divided into several sub-basins by peninsulas and dotted with islands (Amantani, Moon Island, Sun Island, etc.). Two species of rush thrive on its shores, from which the indigenous people build their boats as well as floating dwellings. - Book: Picture 3 - Peru - 1969