The Heroes of Heaven's Height
A sky tower whose upper half was long ago turned to dust, this open-roofed tower serves as the city’s primary prison for serious criminals. In the center of the building is the main support pillar, along which run several jury-rigged rope walkways and officer stations, and on top of which are built eight pulley elevators.
Around the central support pillar is a courtyard about 30 feet in distance until you come to the outside ring, where the holding cells are located. The bottom 20 stories are so are almost entirely empty, with the upper 20 holding the actual prisoners.