The story involves a German professor who believes there are volcanic tubes going toward the center of the Earth. He, his nephew, and their guide encounter many...
The story involves a German professor who believes there are volcanic tubes going toward the center of the Earth. He, his nephew, and their guide encounter many adventures, including prehistoric animals and natural hazards, eventually coming to the surface again in southern Italy. View our full collection of podcasts at our website: https://www.solgoodmedia.com or YouTube channel: https://www.solgood.org/subscribe
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