Thor and the other boys ran away from the bursting lava spring, keeping their distance as it seemed to bubble ever higher. It was a good thing they did, because the ground around it began to melt. “What is this place?” William asked, fear in his voice. “Let’s keep moving,” Reece said. They all turned and continued heading north, hurrying away from the lava burst. But just as they were gaining distance, suddenly, another lava spring burst up from the ground, with no warning, just a few feet away on their other side. William screamed and jumped, the flames just missing him. They all hurried to gain distance from that one, too—but then, suddenly, all around them and as far as they could see, lava springs burst out. There came hissing and popping noises everywhere, as the land burst up li

