It is piled high with the bodies of those that did not survive the torture process. The smell is absolutely nauseating and the rats are multiplying faster than the castle can be rid of the corpses.
Disposal area, Inside Castle
guard
rat
I am a large gray rat that scurries around in the castle walls. I like visiting the kitchen to snack on the bread crumbs. I carry diseases, so don’t touch me.
Crumbs, crumbs, I love castle crumbs and kitchen snacks. All I see here are dead stinking bodies. Corpses can be tasty too!  Have you tried any? No! I don't eat my own kind!  Well, I think there are some dwarves and elves in here if you look hard enough.  Maybe even a halfling.  Oh look, a ring! I eat pig, deer, rabbits and fish. Elves are too human looking. Well, their ears taste a bit like fish oddly enough. Elves are pretty smart. I can't imagine one letting you get that close to try. They never seem to age. I have never known of a dead elf. Well, the King likes to torture some to death.  There was one at the bottom of this corpse pile last week. I suppose you finished him up. Wouldn't you rather eat table scraps? I'm not all that choosy.  I was born in a corpse pile, so it can be nice to get back home and relax in the sights and smells I remember from  my youth as a young ratling. Disgusting. Well, I have about had enough of guarding the dump. I don't think I will eat for a week. Nice talking to you rat.