Lake Baikal

Baikal is the largest lake in the world by volume and is also the deepest. In fact, it is just over a mile deep. It is said to hold as much as 20% of the world's fresh surface water reserves, roughly equal to the volume of the Great Lakes combined. It is also very clean-you can see the bottom at 40 meters depth. It fills a tectonic fault that is getting wider by a couple cm per year.
There are various pictures of the lake, many through the haze of smoke. The last is the Delta of one of the several hundred streams that feed into the lakeもっと詳しく