A Journey to the Center of the Earth (1864)

In today's world, we take underground tunnels, trains, space travel, satellites, etc, as standard everyday things. However, there was a time when there was no concept of having long tunnels under the seabed, or massive bridges many kilometers long; and travel to space was difficult to visualize (astronomy existed, but to visualize precise details was difficult). It is to the credit of the science fiction writers of that time that they were able to visualize underwater, underground, and space travel adventures. One of the most famous science fiction writers of that time was Jules Verne, who wrote about locations and adventures that were unheard of in the 19th century, and many of which bear a good resemblance to what came into reality many many decades later. One of Jules Verne's novels that makes interesting reading is the tale of a journey underground - A Journey to the Center of the Earth.



However, this novel should be looked upon as fiction. In this particular case, the novel is not very accurate. However, it is still a good work of fiction, and should be read for that reason alone.
The story is that of an eccentric professor, who is attempting to follow in the footsteps of an Icelandic adventurer who had made an epic journey to the center of the earth a long time back, and of which there are not many records. The professor gets his nephew to follow him (well, actually the nephew volunteers for this expedition), and along with a strong, silent, guide, they head off this to this incredible journey.
The professor finds a coded text in a book written by Snorri Sturluson, and is desperate to decode the parchment, going without food if necessary. It is the nephew, Axel who managed to decode the code, finding that it was just written backwards. He is concerned about what his uncle will do if he finds that the text has been decoded, but after 2 more days without food, gives up and tells his uncle about the decoding. The code is very simple: "Descend, bold traveler, into the crater of the jokul of Sneffels, which the shadow of Scartaris touches before the calendas of July, and you will attain the centre of the earth; I have done this, Arne Saknussemm" (the translation in English).
Inspite of the protestations of his nephew, the professor is eager to take this trip, and after arriving in Reykjavík, they hire an Icelandic hunter, Hans Bjelke, as their guide. After some delay due to clouds, they are able to find the starting point, and start a descent into a crater. And then start their adventures, with very sharp descents, almost running out of water once, another time when Axel separates from the others and is only able to find the others due to a strange acoustic phenomenon. They find strange creatures, and a massive underwater cavern with a huge water body; the water body contains many prehistoric creatures.
At a point however, they find that the path is blocked; they decide to blast their way through; however, the resultant upheaval pulls them through the blasted path at a high speed, and soon they find themselves in a close proximity to hot water and magma. Just when they are sure that they will soon boil, they find themselves rising fast, and soon get ejected from a volcano (in Stromboli, in Italy - very far away from their descent point in Iceland). They are all termed as heroes when their journey comes to public knowledge.