The Hogwarts Lake is a large body of water located to the south of the castle. It is about half a mile in diameter and the Hogwarts plumbing network drains into it. It is home to a giant squid and a colony of Merpeople. The lake was also used as the site of the Second Task of the Triwizard Tournament. The Slytherin common room is beneath the lake, accessed through an entrance in the school dungeons. The Chamber of Secrets is also thought to be beneath the lake.

Hogsmeade Station, also known as Hogwarts Station, is the railway station that serves both the village of Hogsmeade and Hogwarts School of Witchcraft and Wizardry. The station is located near the Hogwarts Lake, and from there a road extends around the lake to Hogwarts Castle. It is actually quite a distance from the village itself, being on the opposite side of the Hogwarts grounds. The Hogwarts Express stops here after travelling from King's Cross Station.

The Viaduct is a part of Hogwarts Castle. It is constructed of stone, and extends all the way down to the lake. A courtyard outside the Entrance Hall contains an archway that leads to the Paved Courtyard and across to the viaduct. At the other end, there are double doors which lead into the Viaduct Entrance. There were two talking gargoyles at one end of the Viaduct, but unfortunately one was smashed during the 1994 Triwizard Tournament.

The Covered Bridge is a feature of Hogwarts Castle. The bridge appears derilict, and is constructed of wood beams which extend to the floor of the ravine it lays across. The roof of the Covered Bridge is sagging and appears thatched and tarred. The bridge blends in with the natural environment surrounding it.

The Paved Courtyard is a courtyard located on the Hogwarts Castle exterior area. It is connected to the Viaduct and the Boathouse. Gobstones players usually come into this courtyard to play "Snake Pit". It is home to a Talking Gargoyle. The Fourth Floor corridors pass right next to this courtyard.

The Forbidden Forest borders the edges of the Hogwarts School of Witchcraft and Wizardry grounds. It is strictly off limits to students, except in the case of detention, or Care of Magical Creatures lessons that occasionally take place there.

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Flying is a subject taught at Hogwarts. The subject teaches students how to fly broomsticks. It is only available to first years.

Herbology is the study of Magical and Mundane plants and fungi. In Herbology, students learn to care for and utilize plants, and learn about their magical properties, and what they are used for. Many plants provide ingredients for Potions and medicine, while others have magical effects of their own right.

The Boathouse is a exterior building at Hogwarts where the boats are stored and where they dock when the First Years arrive at Hogwarts Castle. The portrait of Percival Pratt, hanging on one of the walls, conceals a shortcut to the Grand Staircase. There are some rafters in the ceiling, that are used to store the small wooden boats. There are four entrances to this building: The path outside the Paved Courtyard, the stairs going down from the Entrance Courtyard, the hidden passageway behind the potrait of Pratt, and the Lake.