Columbus.

It's set in Columbus, Indiana, a city known for its architecture. The basic plot of the film revolves the son of an architect and a young local woman spending time together in and around all the famous buildings, gardens and museums as they get to know each other and discuss the problems of their lives. It's a very small scale story about the everyday lives of two people, so the architectural setting really stands out and dominates the film - particularly due to the beautiful cinematography which showcases it superbly. I think that was the point, too, as you'd expect from a film set in an architectural city that is literally named after that same city.