All Seeing (a.k.a A-See or Sir.) owns "The House Above the World". A big house on the biggest hill closest to town. Outside the house is a sign which says "In this house, The House Above the World, lives All Seeing. The best pony analyzer in Equestria!".
The house has 11 rooms (including kitchen and bathrooms) and a big balcony on the second floor. The inside decoration looks horrible, as All Seeing is not very good at interior design.