It looks like it used to be a hotel but was converted when the humans captured all the horses to hold them. The walls are re-enforced and the doors have been replaced with iron cell doors like that of a modern day prison. Most of the rooms have no windows and the ones that used to are all boarded up so no light comes in. The prisons on the second floor can hold up to 5 horses in each comfortable, 7 if none of them want to lie down while the ones on the first floor can hold 3 comfortably and 5 if they all cram in. The last two cells on the second floor are where the more well behaved equines stay, they had 2 windows in each but it you abuse this privilege then something bad will most defiantly happen, plus the fall goes straight to the cobble stone. This isn't a horrible prison but it's impossible to escape because everyone can hear every sound you make because the building is so old. The basement is where the new slaves go to be broken in. The prison is located in the dead center of Syn's territory so the slaves are let out at night when the gates are closed and when the slaves are all back inside then the gates are opened again. Either Lilith or Vow brings the food, or both, when more guards are rounded up they will help as well.