There are many cities in the world smaller than Lake Baikal. To put its size in perspective, let’s take a look at the famous Loch Ness (Scotland). 755 feet of maximum depth, 23 miles long ...

Most of the time it's pretty ordinary looking, but if you go there at the right time you might be lucky to get a glimpse of a phenomenon which transforms the lake into what looks like a giant eye.

Part two of a two-part documentary about Lake Baikal, the oldest (25 million years) and deepest (1,700 m) lake in the world. The film aims to raise awareness of the fragility of its ecosystem.