Hufflepuff Basement

The entrance to the common room is located "in a nook on the right hand side of the kitchen corridor", concealed behind a stack of barrels. In order to reveal the entrance, no password is required. Instead, one must tap the barrel two from the bottom, middle of the second row, in the rhythm of ‘Helga Hufflepuff’, which will make the lid swing open, exposing a passageway that will lead to the basement when crawled through. However, if the wrong lid is tapped or the wrong rhythm is used, the intruder will be doused in vinegar and barred access. The Hufflepuff dormitories are also located in the cellar and have perfectly circular doors, with lots of little underground tunnels leading off from the common room.