ถังออกซิเจนTraditional New Year's dive in Siberia. Russia This tradition started in 1982 by a Russian submarine is operating in the black water of Lake Baikal. To Siberia, which has a depth of 5,390 feet, they cut a hole in the ice cover on the left, and then dive into the new year to be planted and to dance around divers. It seems harmless, but the fact that this lake is the deepest lake in the world. Under the ice. And we do not need elaborate cooling it. And divers to swim without having to carry heavy equipment into a total of 100 kg of water, it is apparently frozen hell.