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Professor Von Hardwigg believes there are volcanic tubes going toward the center of the Earth. He, his nephew Axel, and their guide Hans encounter many adventures, including prehistoric animals and natural hazards, eventually coming to the surface again in southern Italy.
Genre: Science Fiction
Tags: Travel, Science Fiction, Dinosaurs, Novel-Classic
Age Rating: Older than 7
Posted:
Concluded: (Added Chapters 41-45 (final))
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