This is Lake Baikal. The geographical scope of the movie is the whole Baikal Lake basin that extends to two countries, Russia and Mongolia, and encompasses waste territories with rivers bringing waters to the lake. The Baikal Lake Basin is home to several architectural and natural landmarks, as well as rare scientific artifacts.
This record breaking lake holds twenty percent of the Earth's fresh water -- as much as all five of America's Great Lakes combined. But, with a water temperature rarely rising above eight degrees Celsius.
Baikal without boundaries
https://youtu.be/WPGEZfJsOlY
Y O U T U B E C H A N E L L:
https://www.youtube.com/channel/UCXu0T0E5ubHJZyHddxQ2u7Q