The Backrooms are a fictional location originating from a 2019 4chan thread. One of the best known examples of the liminal space aesthetic, the Backrooms are usually portrayed as an impossibly large extradimensional expanse of empty rooms, accessed by exiting ("no-clipping out of") reality.
Internet users have expanded on the concept of the Backrooms, introducing concepts such as "levels" and hostile creatures that inhabit the space. In early 2022, American Youtuber Kane Parsons started a series of Backrooms short films on YouTube, which went viral. The videos have been credited with igniting a surge in Backrooms content and taking the concept into the mainstream. Parsons is slated to direct a film adaptation of his series produced by A24.