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. Inside the left Bell Tower is Filch's Office.In the first two films, the towers were quite short and had small "balcony-like areas" below the turrets at the top.

The Clock Tower doesn't begin at the Ground Floor level. Because it's placed on top of a hill, the Tower begins at the Third Floor level. When you enter the Tower, there's 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's 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's 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 Defence Against the Dark Arts Tower stands next to the Viaduct Entrance and overlooks the Suspension Bridge. The tower has a "semi-circular" shape and is where DADA lessons are held and where the DADA professor's office is. Minerva McGonagall's office is located on the first floor of this tower. The Defense Against the Dark Arts staircase runs through the center of this tower.

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.

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.

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 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 including Dilys Derwent and Phineas Nigellus Black. Many magical instruments are kept here, such as the Sorting Hat and the Pensieve.

This is one of the many towers of Hogwarts Castle which has a semi-ovular shape. It is located on one side of The Quad and is at the end of the hospital corridor which connects the Clock Tower to the rest of the castle. On the first floor of the tower is the hospital wing and school matron's office. There is also a staircase that leads to the fourth-floor corridor and, by extension, to the Grand Staircase.

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.

This is one of the four towers surrounding The Quad. It overlooks the Stone Bridge. The first floor landing of the tower goes over here connecting the First Floor Corridor to the Stone Bridge.

The Owlery is located on the top of this tower. During the winter months, the tower is very cold, to the point that one has to be careful with ice on the higher landings. A tightly spiraling staircase leads from the bottom of the tower on the seventh floor up to a door leading out onto the battlements.