Which lake is shared by Peru and Bolivia?

Lake Titicaca is shared by Peru and Bolivia. It lies high in the Andes, with its western portion in Peru’s Puno Region and its eastern portion in Bolivia’s La Paz Department.

Often called the world’s highest navigable lake, Titicaca sits at about 12,500 feet above sea level. It is also South America’s largest lake by surface area and water volume. The lake is divided into two major basins, the larger Lago Grande and the smaller Wiñaymarka, which are connected by the Strait of Tiquina.

Titicaca has deep cultural importance. Islands and shores around the lake were inhabited by Andean peoples long before the Inca period, and Isla del Sol in Bolivia was an important sacred site. The name may derive from an older name for that island’s sacred rock, though its exact linguistic history is debated.

A common misconception is that all of Titicaca is entirely freshwater. Its water is slightly brackish, and most water loss occurs through evaporation. The lake’s main outlet is the Desaguadero River, which flows south toward Lake Poopó.