The Prison can be found in Mythrad.
A cold white building sits sturdy in the dirt. Small, barred windows mark this out as the prison, that and the gallows and stocks beside it.
A guard greets you outside, and says that there are no scheduled visits, thus you cannot enter.
If you have a note from and authority figure you may enter. The building inside is dark, dry and pungent. Iron cells hold the odd criminal here and there, most of whom are cowering in corners, or under bunks. Whilst Mythrad may appear a jovial place, it is only kept that way by a ruthless and stringent judicial system, and you can’t help but feel sorry the men, most of whom are probably only petty criminals.