Professor Liedenbrock discovers a cryptic Runic parchment written by the sixteenth-century alchemist Arne Saknussemm, which asserts that a descent into the crater of the Icelandic volcano Snæfell leads directly to the centre of the earth. Driven by an unyielding desire for scientific discovery, the Professor immediately organizes an expedition, accompanied by his hesitant nephew Axel and an unflappable eider-duck hunter named Hans.
After reaching Iceland and scaling the perilous heights of Snæfell, the three explorers lower themselves down the volcanic chimney into the deep subterranean abyss. Armed with scientific instruments and modern tools, they navigate through seemingly endless corridors of granite, basalt, and coal, descending leagues below the earth's surface while encountering astonishing geological formations and primitive fossil strata.
During their descent, Axel becomes temporarily separated from the others in the dark labyrinth and suffers the terrifying despair of being lost and waterless. He is saved through an acoustic phenomenon that allows his uncle's voice to reach him across miles of rock, followed by Hans discovering a subterranean chalybeate spring that revives their failing strength.
Resuming their journey, they emerge upon the shores of an immense subterranean ocean lit by continuous electric light. They construct a raft from fossilized wood and set sail across the vast sea, encountering prehistoric marine monsters such as the ichthyosaurus and plesiosaurus engaged in deadly combat, and witnessing magnificent natural phenomena like a towering underground geyser.
Blown rapidly across the deep waters by a violent electric storm, the explorers face the perils of the tempest and the mysterious forces of the subterranean world. The narrative follows their unwavering advance into the unknown depths, steadily pursuing the ultimate secrets hidden beneath the terrestrial crust.
