It is the world's highest lake with commercial ferry traffic and the biggest lake measured in terms of volume in its part of the world. What is the name?

Explanation

Lake Titicaca is located in the Andes mountains on the border between Peru and Bolivia. It sits 3,811 m above sea level, making it the world's highest lake with commercial ferry traffic. The lake covers an area of 8,372 km² and is South America's largest, measured by volume. According to old Inka legends both the sun and the moon were born on two islands in Titicaca.