In the basement of the headquarters of the Twelve Army, Bowie found himself being led to an endless corridor that had hardly any light in there. If his head was not covered by the same black cloth that his men used to cover Nora or rather Andra's face, he would have seen the twenty cells they passed by in that basement level.
Each of those cells is a stand-alone concrete box. Fifteen of which were occupied. Some were shackled to a metal ring on the wall. Others were chained by the wrist to an overhead bar. Few were lucky enough to be naked on the ground with a plastic bucket beside them.
The cells don't have anything to protect the prisoners from the cold walls and floor. There was nothing but darkness day and night. Some days, music was blaring around the clock, while some days, there was nothing but a pin-drop silence.