Megastructure

The Megastructure genre (often categorized under speculative fiction, sci-fi, and architectural futurism) focuses on gargantuan, self-contained artificial structures that dwarf traditional cities and often encompass entire regions, planets, or solar systems. At its core, this genre isn't just about big buildings; it is about how humanity (or alien life) adapts, survives, and builds a society inside an engineered world.