You are closing toward Twilight's Library and surrounding. The great Tree Library of Ponyville. The still growing and living tree continues to provide for the fair citizens of Ponyville, but now it holds a unicorn of such talented magical ability that she was chosen as Princess Celestias own right hoof student. This is a place of learning because of it, and one of the best places to interact with Twilight Sparkle. Just keeps your hooves clean if she has any guests who are among her five best friends.