Explanation:

Lake Baikal is an ancient, massive lake in the mountainous Russian region of Siberia, north of the Mongolian border. Considered the deepest lake in the world, it’s circled by a network of hiking paths called the Great Baikal Trail.Lake Baikal is the largest freshwater lake by volume in the world, containing 22–23% of the world's fresh surface water.With a maximum depth of 1,642 m (5,387 ft),Baikal is the world's deepest lake.It is considered among the world's clearest  lakes and is considered the world's oldest lake at 25–30 million years.It is the seventh-largest lake in the world by surface area.