There is an unfinished instance that lays just north of Stratholme. It can be seen on the world map but is otherwise inaccessible without the use of glitches or exploits. It contains segments of Stratholme that are inaccessible through normal play including an untextured model of Naxxramus.

Through the use of glitches in 5.4.2, it was possible to fall out of the Naxxramas dungeon in Northrend, walk to a glitched instance of Stratholme, past the unused portal in Stratholme to find the unfinished model of Naxxramas.