The dungeons are home to those in Slytherin House. Here you will find the common room and dorms, along with the Potions classroom.

Home of the badgers. The Hufflepuff common room and dorms are in the basement, along with the kitchens, which is quite convenient really, isn't it.

The ground floor is where you'll find the main entrance to the castle, along with the Great Hall used for meals and ceremonies, and some classrooms.

This is the place to go if you've had an accident, or been punched in the face by Dorcas Meadowes. because it is the location of the Hospital Wing. There are also some classrooms on this floor, but that's not as useful in a pinch, is it.

What do we have here? More classrooms? A few storage cupboards that are perfect for snogging in? Yep. Plus a miserable ghost that lives in a toilet, but we don't pay attention to her.

The third floor is a little dull except for the fact that it houses a secret passage that leads into Hogsmeade. The hidden door in the statue of the Humpbacked witch is pretty handy.

Ahh, the fourth floor, the haven for all book lovers. The library can be found here (obviously) as well as the entrance to the clock tower (almost made an unfortunate typo there!) and the armoury.

Classrooms, cupboards, other boring things, and, oh yeah, the Prefect's Bathroom. *wink wink*

Surely there's got to be more to this place than classrooms and cupboards... Surely!

The Room of Requirement! Except hardly anybody knows about it so to the naked eye it's just... another floor of classrooms and cupboards.

So many towers! The Ravenclaw and Gryffindor towers, the clock tower, the Astronomy tower. How many towers do we need? Loads, apparently.