Much has been said about lake Baikal, how there are monsters and aliens down there, mysterious lights entering and leaving the lake, soviet experiments, etc.
But to me, the weridness of baikla comes from it's "oceanic like" species while being a fresh water lake, Giant Amphipods and Copepods, species of sponge much larger than any other fresh water sponge, and even the world's only species of fresh water Seals, and who knows what else is down there.
Why only there? There are other great lakes in the world that don't have species that look that closely to oceanic marine life, sure those lakes aren't as big and deep as Baikal, but still.
it's like baikal is an experiment to make a freshwater, inland sea that mirrors the actual sea, but the lake is 30 million years old, who would conduct this experiment and why?