In the first pic, I'd like to see a slower shutter speed. Probably twice as much as you currently have to create a silky smooth water effect like you have in the second pic.
The last one of the bridge seems a little cramped. Top to bottom is really nice, but the right side you have part of the bridge, and if you had the entire bridge in the image, with the high mountains in the background, I think it'd be even better. You'd probably need a wider angle lens I'm guessing, or moving back as much as possible.