Intriguing shot, it seems that the right hand corner has some sort of landscape image embedded on it? Leafless trees? And yet the bitumastic edging suggests that its a rooftop of some sort......Your images seem to always catch me....well done! lol btw I'm not at all bothered by the left hand bottom corner, so I'm obviously weird...or lazy.
I agree about the lower left corner (clone it out?), but otherwise the shot is really super! I like the composition, perspective, and palette a great deal.
Although the left-bottom thing side doesn't seem right, but the whol shot is very good...if there wasn't such a thing, it could be very great...well done!