He was always interested in journeys, in his time and in the future. In 1869 he wrote twenty thousand Leagues under the Sea, about a journey under the sea: that journey was only really possible years after he died. And he wrote about a journey to the center of the world in Journey to the Centre of the Earth [1864].This was not possible in Verne's tine and it is not possible today. Perhaps it will be possible in the future.
Jules Verne always wrote exciting stories about these journeys But in Round the world in the eighty Days, the people are interesting too. The stories about Phileas Fogg, a very English Englishman, and his French servant Passepartout in other countries are often very funny.