The megastructure is one of science fiction’s most enjoyable guilty pleasures. There is no other genre of literature that takes quite such glee in describing buildings, whether made by the hand of man or alien. Arthur C Clarke’s Rendezvous With Rama is little more than a guided tour of the titular spacecraft through the eyes of its human explorers. Only in science fiction can an entire novel be dedicated, in immense descriptive detail, to conveying the spectacle of an imaginary structure to the reader.
SFs most famous megastructure is the ringworld, a stripe of artificially-constructed land encircling a star, first envisioned by author Larry Niven in his 1970 novel Ringworld. The idea made Niven one of the most famous SF authors of his day, at a time when the novel was still the most powerful way of casting the full spectacle of sci-fi into the imaginations of the audience. Movies and television reached a far larger audience, but too often fell short of the spectacle sci-fi readers created for themselves.