Predator Cities are fictional, mobile cities that roam a post-apocalyptic world, consuming smaller towns for resources. This concept is popularized in the novel and film series, Mortal Engines, where these massive cities are equipped with enormous wheels and engines, allowing them to travel across landscapes. In this universe, cities like London and Paris have become predatory entities, engaging in a survival-of-the-fittest struggle. The story explores themes of industrialization, environmental degradation, and the consequences of unchecked technological advancement, as these cities compete for dwindling resources in a devastated world.