Here is a video of a very famous lake. It’s exceptional because there are people in almost every shot, but you never lose sight of the scale.
Those cracks and bubbles are so spectacular because the water of Lake Baikal is very clear.
The geology behind Baikal–the oldest and deepest lake on the planet–is complicated, even for the experts. Some think it’s a result of the distant India/Asia continental collision. Others think that there might be a mantle plume far underground, forcing the continent to spread apart here.
Whatever is going on has built something awesome at this moment of geologic time. When spring comes, you need a satellite to see the ice melt on this lake!