In Rona Jaffe's book Mazes and Monsters (and the subsequent TV show), a system of labyrinthine caves offered college students a visceral setting to carry out their in person D&D games. At MSU, and other college campuses, this actually happened to some extent in very twisty (and horrifying) steam tunnels built as part of the college infrastructures. Why anyone would go there willingly is beyond me, but maybe the appeal of a setting that replicated an actual D&D dungeon overpowered their common sense. Rats, mold, slime, cockroaches, stifling heat and steam jets all contributed to an extremely hazardous and disgusting underground lair. The obviously on-set cave system of Mazes and Monsters was a paradise compared to the real hellhole under MSU. The most glaring catch though is that Michigan State University officially denied that the tunnels could be accessed. They claimed they were sealed, locked, bricked and mortared. Maybe an occasional engineer could enter for maintenance purposes, but that was all.