The Forbidden Forest is a large, dark forest in the boundaries of the school grounds. It is usually referred to simply as "the Forest" and in the film series as the "Dark Forest". It is strictly forbidden to all students, except during Care of Magical Creatures lessons and, on rare occasions, detentions.
Among the plant species within the Forest are trees such as beech, oak, pine, sycamore, yew and knotgrass and thorn undergrowth. Though the Forest is vastly dense and wild, there are a few paths and clearings. Hagrid, who frequently travels into the Forest for various reasons, mostly makes these trails. The Forest is also home to an assortment of creatures. The following is an incomplete list of beasts that inhabit the forest:
A herd of at least fifty Centaurs, A colony of Acromantula, Unicorns, Thestrals, Trolls, Bowtruckles, and Fluffy, a three-headed dog. No students are allowed to be here! A adult escort and permission from a Head of House or the Headmistress is required for entrance to the Forest. Any students caught without a adult escort or permission will be taken back to the castle and be given a serious punishment, along with a letter sent to their parents.