Novel by Jules Verne, published in 1864 in French as Voyage au centre de la Terre. It is the second book in his popular science-fiction series Voyages extraordinaires (1863-1910). Otto Lidenbrock, an impetuous German professor of geology, discovers an encoded manuscript in which a 16th-century explorer claims to have found a passageway to the center of the Earth. Otto impulsively prepares a subterranean expedition, enlisting his young nephew Axel and a stoic Icelandic guide, Hans Bjelke. After descending into an extinct volcano in Iceland, the men spend several months in a underground world of luminous rocks, antediluvian forests, and fantastic sea creatures until they ride a volcanic eruption out of Stromboli Island, off the coast of Italy.