Moreno Glacier, 250 square kilometers of ice area, 30 kilometers long, in front of the tongue of ice is Lake Argentina. The "living" glacier has been pushing forward, becoming a barrier between the northern sides of Argentina's Hunan Province. But because the water level on the south side of Brazo Rico will rise after being blocked, the ice barrier will break down due to high water pressure, and a large number of lake water will be reinjected, thus forming a natural cycle of advance and retreat. In summer, ice often breaks down and bursts into the water. If you pay attention, you can hear the sound of crushing and breaking inside the glacier.