The Metropolis Armory Ward was one of the most secure prisons in the United States of America, second only to the Blackgate Penitentiary. Situated at the end of a river and atop a waterfall in Metropolis, the M.A.W. as it was called was only accessible through underground tunnels, by boat or via air travel. It was considered one of the hardest prisons to break out of, with only Lex Luthor accomplishing the task single handedly. Ethan Boyer was also one of the few inmates to break out, although he had the help of the Rampage.