Dungeon
Appearance
![](http://178.128.105.246/content-http-upload.wikimedia.org/wikipedia/commons/thumb/3/32/BlarneyCastle5.jpg/220px-BlarneyCastle5.jpg)
A dungeon is a room or cell in a castle to keep prisoners. Most dungeons are underground, others are high up in towers.
An oubliette is a type of dungeon that can be entered by using a trapdoor in the ceiling. People were thrown into an oubliette from the ceiling and left there to starve or dehydrate to death, making it akin to immurement.