Only very few people know about the Room of Requirement. It takes whatever shape the person using it needs it to be after walking past the spot where the door will appear three times while thinking of what the room should look like.

The Astronomy Tower is the highest tower of Hogwarts. Here Astronomy is taught. Students are only allowed to enter to attend their classes.

The Divination Classroom is where Divination classes are taught at Hogwarts School of Witchcraft and Wizardry. It is located in the North Tower. It is accessible through a circular trapdoor and is described as looking like a cross between somebody's attic and an old-fashioned teashop. The Divination Staircase leads to this classroom.

Guarded by the portrait of the Fat Lady is the Gryffindor Tower. The Fat Lady demands a password before she opens the ways inside. The Common Room is decorated in the house colours red and gold. Staircases lead to the Dormitories and on the stairs to the girls' dorms are protected by a spell which transforms them in a slide should boys try to use it.

This is the classroom where Arithmancy is taught. Inside are desks and chairs as well as a black board and number charts.