Just a thought about shadow pictures. This is a personal taste thing so take it as that. As a general rule (a rule I admittingly break on more than one occasion) I feel that when taking shadow pictures I try not to include the subject creating the shadow, or maybe just a small piece of the subject to give an anchor. I feel this adds some mystery and interest for the viewer trying to fill in the rest of the scene that would create such a shadow.
And I am not dissing your photos, my first thought was "I would have shot that", but then I would have tried to compose out the subjects and keep their shadows. The bridge would be tough, but I like what you are seeing.