I think it is looking really nice - However, I agree with the above comments of nothing really standing out. Not that your modeling is bad, I think the scene looks great. I mostly think that the lighting could be more inspired and you could use some color to draw focus in the scene.
Take a look at this Uncharted 2 screenshot and note a few things:
A) Without the red color, that boxcar hanging from the cliff would blend almost completely with the background.
B) By using some saturated earth tones, such as the yellows, reds and rich teals, they are able to very successfully pop out their architectural elements without removing the age of the materials.
I think this is something that would REALLY make your scene pop out more. I strongly advise you to add some vertex coloring on top of your materials and see what that results in, if it doesn't quite work, I think that you should rework your textures to have some more colors in them other than that brown hue.
Once that is done post some screenshots and let us have a look! But I think that will go a VERY long way to making your scene pop more.
By adding some color to the hidden pathway on the right side of it you can also direct focus there.
Keep up the great work!