Within the walls of Lincoln Castle is a restored Victorian prison, designed to keep prisoners separate from each other to avoid corrupting influences and to encourage repentance and reformation. It has the only remaining 'separate system' chapel, built with individual enclosed stalls so that prisoners could only see the chaplain and not their fellow prisoners. The interpretation is excellent and very educational. Children can dress up as prisoners or staff members and there are interactive touch screen displays and lots of stories about the people who were held there, some children as young as eight. Fascinating.