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.
Good day to you as well. Is there anything you would like me to do for you sir? Could you update me on how the relocation of the prisoners is going? Very well sir, there was a little glitch this morning when some bandits tried to break free one of the prisoners, but it was quickly dealt with Good we cannot afford any hiccups it is bad enough we had to move locations after the building was damaged in the brawl. The transfer as since continued peacefully and the guards doubled See to it that it continues to operate as such, all of them are very dangerous and we cannot afford to have any escape. Yes, General -takes a swig from the jug nearby-  How is the battle front, Sir? Things go well from what I have heard, I mostly just see to my job of overseeing you lot though. I miss the thrillls of the battle front