I love the ghostlike feel to a lot of these shots; very ephermeral, black and white, grays and blurs; few harsh contrasts and edges... isnt it really interesting how we see?
I usually like industrial pictures. This one is nice but it doesn't quite make it. The wire across the middle is unfortunate--it splits the picture into two halves that don't come together for me. I like the top half. If you were to crop it (or zoom in) above the wire I think you would have a more powerful and dramatic image.
When I look at this photo I say to myself "what is that.. what is that little house doing up there? what did this used to be?" - when I ask questions like this after viewing a photo, that is a good sign, and what I like about this shot is it makes me think.. what might improve the overall composition is getting rid of the tree brances.. they take my focus away from the industrial quality of the shot. I realize that might have been impossible to do in a basic challenge