Hydrology is a branch of geography that studies the properties of water on Earth, especially its movement in relation to land.

A satellite image showing Lake Titicaca, which straddles the border of Peru and Bolivia with the Andes Mountains to the top right. Source: NASA

Lake Extremes

What are the world’s largest freshwater lake, the world’s largest saltwater lake, the world’s deepest freshwater lake, the highest navigable lake, and the saltiest lake?