Slabside Island Maximum Security Penitentiary
A metahuman prison, The Slab's first warden was Shilo Norman, a.k.a. the third Mister Miracle. It is currently located in Antarctica, moved after the disastrous riots of "The Joker's Last Laugh".
- Slabside Penitentiary is nicknamed The Slab because the only way you get out is feet first.