I'm talking about the tower that you need the 7 crystals to open. I wish I could describe the area, but it's been so long since I played the game. I still have it, so maybe I'll play it again. The only thing I can remember is that it shows up on the map, but I don't think that any other rooms were connected to it. (I could be completely wrong). I also seem to get the feeling that you could see an opening from the room, or something, while you ran up a bridge (which probably broke). I think the opening was on the left side of the bridge. This is from 10 years ago, so I could be completely wrong, though.