The trash in the lower left is bad- it's important to look for that in landscape shots- it's only good if you're showing urban decay in the shot, otherwise it's a bad distraction. I think the framing doesn't work- the horizontal bridge with horizontal framing just has the eye go over the bridge and off the edge of the frame. The water would be a better subject with more vertical framing, but it'd probably still need more motion blur to draw the eye away from the white bridge- with some wind and plant motion blur, it might help simplify the composition as well. Overall though, I don't think the water or the bridge make a good central subject here- a bike, dog or person on the bridge might, but again since the subject is nature, I don't think that's going to save the image for the sake of this challenge. I'd still go with a vertical composition to let the water try to draw the viewer into the scene realizing some depth (as it is, it's very 2D with the bridge.) Without anything surrounding the image that's not predominately nature like a road, concrete walls, etc. I'm not sure you reach the "unexpected" goal. If the steam and plants were in a much wider-angle composition that showed a busy intersection, then we'd be in play.
I spent half the day driving around looking for a good "unexpected" subject late last week and frankly didn't find anything I didn't expect. Even my "favorite" plant growing on a steam locomotive didn't get revisited because the locomotive isn't out on display any more. Half a foot of snow overnight has me thinking there's not a lot of unexpected to be found today...
Paul