Gribben

In Chicago, you'll find Gribben. Even though its located where humans will ever find, the prison is underground and guards have warded this place carefully. Gribben, is the Prison in which The Coven uses to store rogue/wayward witches or any of the The Covern goer's if they've made some bad mistakes. Here, as soon as you enter, the place strips you of your powers completely. This is effective with the prisoners, driving them to the point of insanity. Did I also mention theres no way in hell to get out? Each ward is sectioned off by a check point, and there aren't any available ventilation units.