Hi! I would like to suggest a Forbidden Forest. It could be a place where quests could be taken to get extra money or experience or a place to visit and a double Care of Magical Creatures class, even though tthere is a classroom. In the books they take place outside. Anyway, I understand it would be a difficult thing to make and though it would be amazing if done, the amount of time and work put in may be too much. At any rate, hope this is alright!
-Sincerely Kamehameha37