As wide and varied as the rooms of the school itself, the school grounds extend for what seems like eternity. However, there are certain landmarks students learn to identify as the brink of permissible exploration. Overall, the grounds are beautiful, even with its occasionally violently vile quirks.

When not being used for meals, the hall is a common place for students to meet in order to talk, study, and generally mingle. The room is amorphous in appearance: the ceiling is alternately starlit, filled by floating candles, garnished with garishly opulent colors, or decorated for the holidays. The tapestries on the walls likewise change depending on the headmaster's mood. The only solid features are the four tables for the four houses, the staff table at the front of the room, and the headmaster's podium.

The corridors of Hogwarts are just as varied as the classrooms - some are wide, some narrow, some tall, some you have to duck in order to pass through and some seem to shift direction as you pass by. They lead to the different rooms in the castle, while some lead to nothing at all.

The higher levels of the castle consist of a smattering of towers, including the highest-reaching point of Hogwarts, the Astronomy Tower. The Gryffindor and Ravenclaw Common Rooms can also be found up here, as can the North Tower.

The lower levels of the castle are located underground. The basement is the first level where the Hufflepuff Common Room can be found alongside the kitchens. Below the basement are the dungeons. Underneath the Black Lake, the dungeons are as ominous and chilly as they sound and their labyrinthine passages are almost identical in appearance, making it easy to get lost. Besides the Slytherin Common Room, the dungeons also contain the potions classroom and the Potion Master's office. Other, less frequently used rooms, can be found in the dungeons and are sometimes used for detentions, among other things.