Yeah...I like #3 and the way the entire compositional space is used. What I like about #3 is the intererplay between the curved arches in the foreground areas, against the straight up and down vertical concrete pillars in the background. There are also some very small reinforcement pieces that peek out on the vertical columns, and those add a bit of interest. To me, #3 is a very subtle photo, one that gets better the longer I look at it. In contrast, #2 is brash,and has much more discordant elements in it. In #2, the vertical columns at the very top are interrupted by the curved arches and then the vertical lines reappear lower in the composition; while some people might feel that photo #2 is more dynamic, to me it seems to have almost too much variety, and too much discord, whereas #3 is a lovely study in balance,and in actual architectural design principles put into practice. So, yeah, I like #3 for those reasons.