imaginative and nicely composed. (except #3 where the light haloing is disturbing)
In #6 I suggest you reprocess this and darken the entire photo on one layer with the masked out couple and the rest in a layer on top to eliminate that large white halo around the lamp and bannister. This could be done with a channel mask quite easily.
I really like these! Beautiful scenery and angles, and well composed pictures. Although I have to agree with "The Traveler" on the 3rd one; The direct light behind the couple looks a bit weird in those surroundings. The background is very nice, so I believe it would have worked better to just leave it at that. Anyways; great shots!
Yes number 3 looked like they were cut out with paint and then put in that background. The rest looked great though. The bridge one seems very original.