I like how there's a literal representation of RGB, buildings/water/sky in it--I don't know if that was intentional, but a nice touch if it was--serendipitous if it wasn't; nonetheless a great effect. The only thing I would do is crop it slightly--it seems as if the buildings on the right are 'lower' than the left--it somehow seems a bit skewed, though that could be a trick of the eye.
Oh, I might also redden the brownish building on the bottom right--though I've no idea how you would go about doing that--I mostly work with Illustrator, not Photoshop.
No major complaints from me on this photo. A wonderful perspective of the canal and buildings. Sure it could be straightened a little, but from what I understand the city is sinking so you get done leveling everything out only to find the other side of the canal is now lower. Lovely lighting, details and clarity in your image. Nice colours, though the blue of the sky seems more intense than the rest of the scene. Good work, a heck of a lot better than anything I've ever done. Thanks for sharing.
Oh, I might also redden the brownish building on the bottom right--though I've no idea how you would go about doing that--I mostly work with Illustrator, not Photoshop.