The sun shines on the shaft that Arne Saknussemm used. The men climb down the long shaft. Look! A cave! We've reached the bottom! They enter a long tunnel... Look at these walls! It's lava. They follow the tunnel for two weeks... Oh no! We've run out of water! We must go back. No! Axel hears something. What's that strange noise? It sounds like a river! Hans uses a pickaxe to make a hole in the rock. Water! We're saved! Aaagh! Watch out! It's very hot! The men fill their water bottles. We can drink it when it cools down. They continue along the tunnel. Axel decides to explore ahead. Look over here! There's quartz and gold! Axel turns to show the Professor and Hans. Oh no! Where are the others? I'm lost! Suddenly, Axel takes a step and trips... Aaaagh!