"A Journey into the Interior of the Earth" by Jules Verne is a science fiction novel first published in 1864. Professor Otto Lidenbrock, an eccentric German scientist, discovers a cryptic message suggesting a path to Earth's center through an Icelandic volcano. With his nephew Axel and guide Hans, he descends into Snæfellsjökull's depths. The trio encounters subterranean oceans, prehistoric creatures, and a mysterious giant humanoid while navigating treacherous underground realms, ultimately facing dangers that will test their survival.
Date of origin in French, 1864. See also PG#18857 for the common English re-write version, The Journey to the Centre of the Earth. Wikipedia page about this book: en.wikipedia.org/wiki/Journey_to_the_Center_of_the_Earth