We love prison movies for many reasons. Sometimes it's really for the escape part – we love to see the prisoners break, because we love to see the desire of freedom and how much they try to achieve it, even if they fail. We love that claustrophobic setting, characters that can't escape anywhere and what happens or could happen in such settings.
There's almost something mysterious about the whole environment for the majority of people. We often just want to know what's going on in there. The stories use interesting and sometimes dangerous characters, highlighting good and evil in many ways. Whatever your reason, if you enjoy jail/prison movies, then hopefully you'll find stuff to watch here that you've not seen before and you won't regret watching.