The northwest corner, or what is left of it. We see how the ground remains level for some distance, and must be careful with the huge hole to the substructure.
One of some pictures of what I call the south end building. On the map I later added this is "Tower M".
I do not know more about it. It has a couple of what must have been windows from the start, as well as some large holes in its walls that probably are results of neglect or attack. A staircase leads to its top. One can see there is some substructure that I did not dare enter. Wikipedias has "There are also utility vaults used for storage. " That's what they may be.