Stormwind Stockade

Stormwind Stockade, aka The Stockade, is a heavily guarded prison in the middle of Stormwind City. A large number of dangerous criminals, including some criminal masterminds and Defias mercenaries, are currently being held in the stockade. However, not so long ago, there was a revolt inside the dungeon, and the prisoners now keep the Stockade under their control.

History
From Blizzard's Official World Dungeons site:
 * Stormwind Stockade is a high-security prison complex, hidden beneath the canal district of Stormwind city. Presided over by Warden Thelwater, Stormwind Stockade is home to petty crooks, political insurgents, murderers and a score of the most dangerous criminals in the land. Recently, a prisoner-led revolt has resulted in a state of pandemonium within the stockade - where the guards have been driven out and the convicts roam free. Warden Thelwater has managed to escape the holding area and is currently enlisting brave thrill-seekers to venture into the prison and kill the uprising's mastermind - the cunning felon, Bazil Thredd.