* The prisoners were held in a dark and damp dungeon for months.
* The hero bravely ventured into the dungeon to slay the dragon.
* The old castle had a secret dungeon hidden beneath the floorboards.
* The dungeon was filled with the cries of tortured souls.
* The villain planned to imprison his enemies in a dungeon deep within his fortress.
Let me know if you'd like more examples or have a specific context in mind!