These are shots that would benefit immensely from HDR, I'm thinking. #1, everything but the tower looks under exposed. #2, tower is under exposed. I'll bet #3 would be a mighty picture with HDR - its got that mysterious feel to it that many HDR photos exhibit. Aside from that, if you shot in RAW try boosting the exposure a little, and maybe work with curves to get some detail back from the shadows. Also with #3, you might be able to crop the bottom bits out with the cars and still have a great pic. I'd love to see these again edited!