An unusually effective use of negative - which I didn't immediately take in. Good textures and an aesthetic composition with a creative appraoch to the brief. The only flaw is the too-strong 'shadow' (highlight) which has blown under the leaves.
oh wow! i've never seen an inverted image in these contests, and this one's really good. however, i think the wall should have been a little more of an important element (due to the title). those moisture lines aren't as noticeable beside that glowing mass of vines.
I like the mood, the composition, the structure of this. It's too wacky - too much about the effect, and thus about the graphic of it, for me to like it very much though. That might, of course, just be that i don't understand :-)