"Bet it's that one behind the statue of Gregory the Smarmy that we found in our first week. See you."
-- Fred Weasley, on the secret passageway Lee Jordan claimed to have discovered (PS9)
Hogwarts is a place full of mysterious things. A place so old and mysterious is full of many secret passages that lead to other places. Some of which have been marked on the Marauder’s map.
A statue located between Gryffindor Tower and the Owlery, requiring a left turn from the common room to find. Mrs. Norris disappeared behind this statue while setting out to report to Filch after encountering Harry on his way to the Owlery, so a secret passage or short cut may be in its vicinity (OP14).
A painting of Ariana Dumbledore in the Hog’s Head pub conceals a secret passageway connected to the Room of Requirement (DH28).
There are seven secret passageways to Hogsmeade on the Marauder’s Map; during Harry’s third year the twins reckoned that Filch knew about only four of these (PA10):
- behind the statue of Gregory the Smarmy (PS9)
- under the hump of the statue of the hump-backed witch, leads to Honeydukes’ cellar (PA10)
- under the Whomping Willow, leads to the Shrieking Shack (PA10)
- one that is caved in, Hogwarts entrance is behind a mirror on the fourth floor (PA10). Sirius Black suggested that the DA could meet there, but Harry informed him that it was unusable (OP17). Sirius Black suggested that the DA could meet there, but Harry informed him that it was unusable (OP17).