JOURNEY TO THE CENTER OF THE EARTH by SANTI MARTINEZ

Axel lives with his uncle Profesor Otto Lindenbrock , in Hanburg , Germany . They find a parchment of a scientist, Arne Saknussemm, from the 16th century, that explains them how to go to the Centre of the Earth .
They must go to Iceland where the volcano Sneffels Yokul is the door to enter to the Centre of the Earth. In Iceland they need a guide called Hans who attends Otto and Axel in their journey.
For three months all of them travel inside the Earth where they can see dinosaurs, a grey forest and strange men of three meters tall. They find a sea inside the Earth and have to make a raft for sailing. At the end they can return to the surface of the Earth through a volcano, in Stromboli, Italy.

Profesor Otto becomes a famous man after he writes a book about their journey.