The largest lake in South America is Lago Titicaca. Situated on the border of Bolivia and Peru, it is also the highest navigable lake in the world, resting at approximately 3,812 meters above sea level. Lago Titicaca is significant for its unique biodiversity, cultural heritage, and historical importance to the Inca civilization. The lake comprises various islands, including Isla del Sol and Isla de la Luna, both of which are steeped in myth and tradition.