Sometimes architecture can be so singularly powerful that it comes to define a city—just try to imagine a Paris without the Eiffel Tower, or a Barcelona without the powerful influence of Gaudí. And while bigger, staggering buildings often get all of the love, there's something more democratic about bridges: after all, they're accessible for everyone to walk or drive over, and they connect places to each other. Though bridges serve useful functions, it doesn't mean they have to be boring or utilitarian in their design, as these ten, some by world-renowned architects like Santiago Calatrava or Zaha Hadid, illustrate.