It's seems to be less a torture chamber and more a butcher chamber, regarding all the death bodies and rotting meat. It also kind of a lab for creating the meat golems.
It is not locked away, because no other than Magister is expected to see it. Prisoner who enter the fort, won't leave it again, except as monstrosity, as monk or a corpse. Cork wants to get in an inspect, but they would never allow it.
The fact, how less they care about hiding, just proves their madness even more.
