Supermad Prison

The Supermad Prison is a high security Prison Compound in the middle of a lake in Nexus City, under the command of Warden Valmet and owned by the NEXUS Core. 
It is first seen cronologically at the end of Madness Within Me when Kryy questions the NEXUS Police officers about where he's headed. The car in wich Kryy is being transported in is seen driving through the bridge towards the prison complex 
It is the location in wich the Madness: JAILBREAK collab takes place in, where a massive riot happens due to both system malfunctions and multiple, simultaneous escape attempts.
Its security staff is composed of NEXUS Police officers, armored riot guards, the Agency Special Unit and a single MAG security guard.
The Compound has security and surveillance rooms, weapons and arsenal storage rooms, a lunchroom, different prison cell rooms, a MAG staging area, mini-dock loading bays, garage, and the room with an improbability blocker device.
After the riot incident, the NEXUS Core orders to execute all remaining inmates who hadn't escaped(although everyone did) and forced the Prison to be shut down indefinitely for it's obvious failures. Since then, a new prison has been set up.