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.