Alberto Angela tells us the story of the mountains of fire, venerated, loved, hated, and always feared. In this episode of "Ulisse", a spectacular journey takes us to one of the most fascinating places on the planet: the Hawaiian Islands, in turn the symbol of the incredible creative force of the mountains of fire. We go to the point where the lava of Kilauea, one of the most famous and powerful volcanoes on the planet, we enter the sea and go underwater to understand what happens in the embrace between ocean and red-hot lava.