So since l posted a picture yesterday of former US Federal Penitentiary Alcatraz.
I thought you might be interested in seeing. A few more pics of The Rock.
Starting with the top left one of the cell blocks, secondly the outside courtyard that prisoners had to earn the right to use, thirdly was one of the cells used in the escape June 1962 and then the gaurds residence. To avoid boats coming and going to frequently the gaurds would live on the island for set periods of time