Eventually he made his way to the top, where the water geysered forth from a rent in the earth, where the pressure forced it up from some reservoir down below. He stood there, enjoying the spray of the hot water on his face for a time before moving on. Sure enough there was the opening cave mouth he had seen before. Pushing his way through it he followed the heat and the faint orange light, seemingly uncaring about finding his way back until he came to a stop near a hole in the ground. Sure enough it dropped straight down into a dark pit of magma far below.