Gryffindor Tower is located behind the portrait of the Fat Lady on the Seventh Floor of Hogwarts Castle. A password is required to enter it, which is spoken to the portrait. A circular hole is behind the painting, leading to the common room, which is a circular room where Gryffindor students can relax after a long day of studying. The common room is full of squashy armchairs, tables, and a bulletin board where school notices, ads, lost posters, etc. can be posted. A window looks out onto the grounds of the school, and a large fireplace dominates one wall.

The Ravenclaw common room is one of the most airy rooms at Hogwarts. It is a wide, circular room with a midnight blue carpet, arched windows hung with blue and soft, silks, and a domed ceiling painted with stars. During the day, the Ravenclaw students have an excellent view of the surrounding mountains. The room is furnished with tables, chairs, and bookcases; and by the door leading up to the dormitories, there is a tall statue of Rowena Ravenclaw made of white marble.

The astronomy tower is where the astronomy class is taught, it has a huge telescope used for searching the galaxy. This is also the historical location where Albus Dumbledor was killed during the second wizarding war.