Training Grounds

The Training Grounds is where Flying classes are taught to first years at Hogwarts School of Witchcraft and Wizardry by Madam Hooch. The grounds are flat, short-cut grassy areas and are located near the Herbology greenhouses. It is overlooked by the Training Grounds Tower.

During the 1996–1997 school year, the Hufflepuff Duelling Club held its practices in the Training Grounds.

A secret room is located at the grounds.

Behind the scenes

In the film adaptation of Harry Potter and the Philosopher's Stone, this was also where Oliver Wood taught Harry Potter about the rules of Quidditch. In the novel, that discussion took place on the Quidditch pitch.
In the film adaptation of Harry Potter and the Chamber of Secrets the Whomping Willow is located in the Training Grounds. In the subsequent film adaptations, the Whomping Willow is in a much different area.
In the video game version of Harry Potter and the Order of the Phoenix, the training grounds are not accesible, but you can clearly see them if you stand in front of the owlery. The training grounds are behind the owlery.
Alnwick castle grounds were used to film the Training grounds scenes in the first film. However, in the later films the Training Grounds become slightly different, with a ruined section.