Lake Titicaca is a lake in the Andes on the border of Peru and Bolivia. By volume of water, it is the largest lake in South America. Lake Maracaibo has a larger surface area, but is often regarded as a large brackish bay due to its direct connection with the sea.

It is often called the highest navigable lake in the world, with a surface elevation of 3,812 m (12,507 ft). Although this refers to navigation by large boats, it's generally considered to mean commercial craft. At least two dozen bodies of water around the world are at higher elevations, but all are much smaller and shallower.