Built in 1872, the Old Idaho Penitentiary held some of the West's most desperate criminals. Most of the stone prison tells this story--rock walls and thick steel doors. But Cell Block 4 is a little different. In the 1970's the prison began to shift toward rehabilitation rather than simple confinement. In Cell Block 4 they let the prisoners paint their own cells. Each cell is different. There all remain exactly how the last inmates left them. Razors on the sinks. Game boards on the tables. Soda cans left sitting alone. But it's the colors that are most amazing.