Journey to the Center of the Earth by Jules Verne

Axel Lindenbrock and his uncle find a mysterious message inside a 300-year-old book. The dusty note describes a secret passageway to the center of the Earth! Soon they are descending deeper and deeper into the heart of a volcano. With their guide Hans, the men discover underground rivers, oceans, strange rock formations, and prehistoric monsters. They also run into danger, which threatens to trap them below the surface forever.