Introduction to Lake Baikal: Lake Baikal is the deepest and largest freshwater lake in the world. Located in the Republic of Buryatiya and Irkutsk Oblast. The lake shape is long, narrow and curved, like a crescent moon, so it is also known as the "Moon Lake". It is 636 kilometers long, with an average width of 48 kilometers and a maximum width of 79.4 kilometers. It covers an area of ​​31,500 square kilometers, has an average depth of 744 meters, the deepest point is 1,580 meters, and the lake elevation is 456 meters. The water of Lake Baikal is crystal clear, stable and transparent (transparency reaches 40.8 meters), ranking second in the world.