Disclosure: As an Amazon Associate I earn from qualifying purchases. This page may contain affiliate links, which means I may receive a commission if you click a link and purchase something that I have recommended. There is no additional cost to you whatsoever.
Lake Baikal, a UNESCO World Heritage Site in Russia, is the world’s largest (by quantity), oldest, and deepest lake, containing over 20% of the world’s recent water. The lake can be an unlimited storehouse of frozen methane bubbles.
