The Old Prison is the base of The Gorrillo Bandits. It is located in the Southeastern corner of the Bonefields, almost directly South of Mourn. Inside you will find the leader of the faction, Gorrillo, and his Gorillo Bandits.
The Old Prison complex consists of the main tower resembling an Ancient Tech Lab, fairly sophisticated walls and a destroyed Watchtower, suggesting several prior uses before becoming a home of the bulky brawlers.