Bldg 1. There are three of them, in the shape of a U, with the pool in the middle. Number one is on the left side, 2 is at the bottom, 3 is on the right (as I look at it here, it would be reversed if you were coming from Classic Hall). Number 2 would be the furthest, but after staying there, I don't think it makes a huge difference. We were as far back as you can possibly get, on the third floor, and I think it took us about a minute to walk from our room to the walkway from bldg 1 that goes to Classic Hall. If you got a room at the very top of the U, in bldg 1, then you would be closest to the main bldg.