The Time Machine (1895) by H. G. Wells is a science fiction novella that toys with the idea of time travel in a 'time machine'-a term coined by Wells himself. This work about the end of time, is written in the Dying Earth subgenre.
The protagonist, a Victorian English scientist, called the Time Traveler, builds a time machine which takes him into the future. There, he is surprised at how the futuristic humans have turned out. When he comes back and tells his friends about his adventures, none of them believe him.