A nondescript square building that has room for two guards that change shift every 8 hours.  There's a fireplace inside, food enough for a week and a large earthenware jug of water for cooking and drinking.
Guard Shack, Outside Tower
guard
a knight, captain, or general that may oversee the guards.
I am the captain overseeing the guards at my prison. We had to relocate recently due to the fight breaking open part of our facilities. I've been very strict in moving the prisoners to the new location. Some of the guards don't seem to like me, but honestly I don't care.
I lord over alot of people what do you do? Why, sir, I am a guard. good it means you are my boy Yes sir. you know we had to relocate recently due to the fight breaking open part of our facilities. I was out that day. you incompetent guard Get off of me! I was planning to forgive you but now you will sleep in the dungeon for 2 months  You attacked me! because you don't know how to respect your superior  I did nothing!