The Astronomy classroom is located on the top-most level of the Astronomy Tower. Accessed via a steep spiral stairway, this room is where Astronomy classes and practical examinations are held in Hogwarts School of Witchcraft and Wizardry. The classroom is surrounded by crenellated ramparts and iron security railings around the edge of the Tower, where students gaze the skies with their telescopes. Astronomical models and telescopes are propped against the ramparts when the classroom is not in use. A door leads into a turret and the steep spiral stairway inside leads below.

The Bell Towers are two towers that rise over the main entrance to the Herbology Greenhouses. Between the two towers are a set of double wooden doors which lead along the first floor corridor.

The Clock Tower does not begin at the Ground Floor level. Because it is placed on top of a hill, the Tower begins at the Third Floor level. When you enter the Tower, there is a huge space, like an Entrance Hall with flights of wooden stairs at the right and left side. The first landing is at the Fourth Floor level. It is at this landing that are the clock's gears and face. This same corridor connects the Tower to the remaining castle. If you go up another flight of wooden stairs, you will get to another landing, this time at the Fifth Floor level. It is in this landing that are the clock's bells; some massive gold and copper bells. There is another corridor at this landing; like the other, it links the Tower to the main castle.

The Dark Tower is a small but high tower near the Transfiguration Courtyard at Hogwarts Castle. This tower seems to be used as a prison. It has several prison cells, with the topmost being at the roof. The cells are not, however, charmed or otherwise protected against breaking-in from the outside. It has seven floors.

The Defence Against the Dark Arts tower is one of the many towers of Hogwarts Castle. It stands next to the Viaduct Entrance, overlooks the Suspension Bridge and also the Training Grounds.The tower has a "semi-circular" shape and is where DADA lessons are held and where the DADA professor's office is. The Defence Against the Dark Arts staircase runs through the centre of this tower.

This tower is probably the most prominent and recognisable feature of Hogwarts Castle. The tower is a circular shape and has a cone shaped roof. The Grand Staircase is located here, and at the top of this tower, are three smaller towers which make up the the Headmaster's tower and serve as the Headmaster's office and residence.

The Headmaster's office is located within this tower. To gain entrance, a password must be given to a stone gargoyle, which will move aside at the correct password to reveal a spiral staircase with moving steps. The office is a circular room with windows, decorated with portraits of previous Headmasters. Many magical instruments are kept here, such as the Sorting Hat and the Pensieve.

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.

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 Gryffindor girls' dormitory is a room off of the Gryffindor Common Room where female Gryffindors sleep at night. The walls are decorated with Gryffindor crests.

The Gryffindor boys' dormitory is a room off of the Gryffindor Common Room where male Gryffindors sleep at night. The walls are decorated with Gryffindor crests.

The North Tower is one of the many towers in the castle. The tower is the location for Divination classes and the Divination teacher's office. The entrance consists of a ladder leading through a trap door.

The Ravenclaw Tower is located on the west side of Hogwarts, the staircase leading up to the common room is presumably located on the fifth floor, and is the location of the Ravenclaw common room and dormitories. The entrance to the room is at the top of a spiral staircase, and is a door without doorknob or keyhole but a bronze knocker in the shape of an eagle. In order to enter the room, you must answer a question asked by the eagle knocker; if you answer wrong, you must wait for someone who gets it right.

The Ravenclaw common room is one of the airiest rooms at Hogwarts. It is a wide, circular room with a midnight blue carpet, arched windows hung with soft blue and bronze silks, and a domed ceiling painted with stars. During the day, the Ravenclaw students would have an excellent view of the school grounds, including the lake, Forbidden Forest, Quidditch pitch, Herbology gardens and the surrounding mountains. The room is furnished with tables, chairs, and bookcases; and by the door leading up to the dormitiories stands a tall statue of Rowena Ravenclaw made of white marble. According to Prefect Robert Hilliard, the sound of wind whistling around the windows of the tower is very relaxing whilst going to sleep.

The Ravenclaw boys' dormitory is a room off of the Ravenclaw Common Room where male Ravenclaw sleep at night. The walls are decorated with Ravenclaw crests.

The Ravenclaw girls' dormitory is a room off of the Ravenclaw Common Room where female Ravenclaws sleep at night. The walls are decorated with Ravenclaw crests.

The central tower is one of the many towers of Hogwarts Castle. It sits atop the Long Gallery and overlooks the Viaduct Entrance. It is also near the Herbology greenhouses.

This tower can be found on one corner of the Viaduct Entrance, behind the right Viaduct tower. It overlooks the last of the Hogwarts greenhouses, which extend around The Long Gallery.