Which lake is the world's largest freshwater lake by volume?

Which lake is the largest in New Zealand? What is the largest lake in the country of Mongolia? Which lake is the largest in the Canadian province of Quebec? Which lake is located on the border of Argentina and Chile? What is the world's largest lake by surface area? Which of the Great Lakes is the smallest by volume? Which African lake is the deepest? What is the largest freshwater lake in South America?