In Stranger Things, the Brimborn Steel Works plays a significant role in the creation of the Spider Monster. This abandoned steel mill in Hawkins, Indiana, becomes the lair of the Mind Flayer, a terrifying entity from the Upside Down. During the summer of 1985, a fragment of the Mind Flayer that was expelled from Will Byers' mind and body takes refuge in the steel mill. Here, it lays dormant until it begins to summon and melt various inhabitants of Hawkins, including Heather Holloway and Billy Hargrove. These victims merge to form the Spider Monster, a proxy form of the Mind Flayer, which then emerges from the Brimborn Steel Works to terrorize the town.