Mirror passage

This secret passage behind the mirror on the fourth floor is a former secret passage that leads from Hogwarts to Hogsmeade. Fred and George Weasley knew about this passageway when they owned the Marauder's Map, and used it to sneak into Hogsmeade during their time at Hogwarts, until winter in 1992, when it caved in and completely blocked the passageway. It is unknown exactly where the passage led to in Hogsmeade, nor how one would access it.

Appearances

 * Harry Potter and the Prisoner of Azkaban 
 * Harry Potter and the Chamber of Secrets (GBC)