I really like the crop on this. There's just enough of the crane and the building to convey the idea. I would have tried to fit everything into the frame, and it probably would not have had the same impact. It could be a touch brighter, I think.
It's like a I want to see a wider view but as is, it's just enough to make it 'mysterious'. I really like the drab, low lighting in this photo and the contrast of the brighter sky.