Lit only by scattered torches, The dungeon lies far underneath the castle.  Bandits and Thieves who find themselves there are met with cold stone walls and floors, with chains and bars restricting movement.  Guards patrol the corridors, keeping an eye out for any escape attempt or misdeed.  The only comforts afforded in the Dungeon are the piles of hay for sleeping.
Dungeon, Inside Castle
rat
bandit
I am a local bandit. I like to sneak around town. I like the forest a lot.
Yeah, I'm a little busy here trying not to get tortured. Why don't you g bother somebody else. Never! I am a persistent little rat and demand high quality foods! Take a look at this bread....you call this food!? Tell the guards to feed me at once! That's the first thing I've eaten this week. Thanks for the bread. I really appreciate it. No problem, I don't eat moldy foods. I am a chef rat....call me ratatouille! I know where I can get you some real nice croissants if you can help get me out of here, are you interested? Yes of course! What exactly do you need me to do? I do know the ways around the tunnels around here.... Do you know where they keep the keys? If I can get a key I think I can get out of this dungeon. I might know where the keys are at...but first...you need to make me a deal...a deal about some cheese. Agreed?