Great subject, the selective desat is a good idea, though the focus on the vines doesn't seem to be the crispest and the desat brings that to my attention. Still, I like this...bumping to 7.
Desatuaration works for me. It makes me think that there's something special about the vines growing all over the building, but I'm not sure what it is.
Now, here's one shot that I think had been edited beyond what it deserved. The building springs against it's background in a manner that clashes with expectation - and it isn't flash, because it applies equally to the further walls. It looks to me that there were probably some fascinating textures and contrasts to be had around the left-most window, but that's lost in the lack of contrast there, and the eye anyway is pulled by the selective de-saturation. The sky has become weird, and looks almost painted in. It's evident that a lot of work has gone into this - but I'm afriad i'm really not a fan of the results of that.