The most beautiful one I have seen is the Tappan Zee Bridge over the Hudson River in NY state (not NYC) . It is unique because of the causeway. You can also see the cliffs and mountains of the lower Hudson Valley. The bridge itself is not as beautiful as the surrounding landscape. Other memorable ones are "7 Mile Bridge" in the Florida Keys. I also recall a beautiful bridge near Tampa, ST Pete that looked like a Dolphins fin. The George Washington Bridge and Verrazano Bridge are not too impressive after you've crossed them a few times.