The Clock Tower Entrance is one of the three main entrances of Hogwarts Castle (the other two being the Viaduct Entrance and the main Entrance Hall). It aligns with the third-floor corridor, connecting with the courtyard that stems off to the Wooden Bridge and the rest of the school grounds. This large open space can be magically sealed with a portcullis and the massive double doors can be locked with numerous bolts.

At the base of the Clock Tower is a large window that may cause you to question why it is even there as all you can see out of it is the side of a building. Fortunately for you, the massive steel and iron pendulum swinging back and forth will likely pull you out of trying to figure out that mystery. If you look closely at the suspended weight, an imprint of a many armed star in the middle and a number of runic symbols on the outer rim can be seen. Study the purposeful design on the pendulum as long as you like. Just don't fall into temptation of swinging from it and pretending to be a wrecking ball.