A dungeon is a dark, often underground room or cell used historically for imprisonment or torture. They are commonly associated with castles and fortresses, serving as places to hold prisoners or as storage for valuables. Dungeons can also be found in fantasy literature and games, where they often contain traps, monsters, and treasures. In modern contexts, dungeons are popular settings in role-playing games like Dungeons & Dragons and video games. Players explore these environments, facing challenges and solving puzzles. The concept of a dungeon has evolved into a symbol of adventure and exploration in various forms of entertainment.