Wow, huge improvement here. Great job.
Here's the new C&C
Something weird going on with your handrail in the foreground there. On the left side it's very wide, then it seems to bypass the middle column and also gets really really thin. Not sure what's going on...reminds me of an M.C. Escher.
Grass is always hard. My tip, if you're going to do flat grass like that it to do some photoshop work to break it up. What really gives away the fact that the grass is a flat plane isn't so much the middle where you just see grass but rather at the edges where the grass meets the sidewalk, for example.
What I do is use the Clone/Stamp tool in Photoshop to clone some nearby grass and then change the brush from the normal round brush to an image of a few blades of grass (if you're using Photoshop there's a standard brush that works perfectly - if not you may have to create one yourself). Basically you just paint that along the edges where grass meets sidewalk and it fools the eye.
http://dl.dropbox.com/u/384281/01b.jpg
http://dl.dropbox.com/u/384281/01a.jpg
I'm not sure what material the road is. I'm guessing brick? Maybe some more variation and the coloring seems like maybe it's off.
-Brodie