One-Eyed Witch Statue

One Eyed Witch Passage
The One-Eyed Witch is a statue in Hogwarts. But few people know that if you use the correct password, you can gain entrance to a small passage that opens a hole to a tunnel that, if followed, takes you to Honeyduke's Cellar. The passage's entrance is hidden in the statue of Gunhilda of Gorsemoor.

You need to give the password 'Dissendium' first. Once you do the hump on the witch's statue opens to reveal a short slide into a tunnel which leads under the school and takes about an hour on foot to travel to the Honeyduke's Cellar.