Classicly

Ayant découvert un manuscrit runique ancien, un savant, son neveu et leur guide entreprennent un voyage vers le centre de la Terre en y entrant par un volcan islandais éteint. (de Wikipedia) A Journey to the Centre of the Earth, also translated as A Journey to the Interior of the Earth, is a classic 1864 science fiction novel by Jules Verne. The story involves a professor who leads his nephew and hired guide down a volcano in Iceland to the "centre of the Earth". (from Wikipedia)