Lasraspan

Located on Hell's eighth layer, Caina, Lasraspan is the residence of the infernal duke Haborym. Nearly eight miles in length, it is a covered iron walkway along cells that imprison the souls of some of the most dangerous beings that have ever lived. These include the souls of the titan Rhysphano, the Troll Mother, the legendary frost giant Iggird Icejaw, and the rebel Hellmouth Khyedkhyed. Twenty-six legions of bone devil inquisitors stand guard over these prisoners.