Returning to old places
I took a very similar photo about two years ago. But with the new camera I like to go back to my favorite places and try to take even better photos. And this is one of my favorite places for blue hour photos.
It's not that close, as you have to walk across the bridge from the other side, continue a little further and then return back. And standing on the rocks near the water it's also quite dangerous. But I think it's worth it. The sunset was quite colorless, as the sky was very clear. So I knew I had to wait for the blue hour, to take a nice shot.
For more info on this photo check out my blog http://blog.hdrshooter.net