You're kidding me! Ubiquitous and mundane, for the most part, here in Korea. Only thing worse would be pedestrian overpasses!
Well, some of them have shopping areas with them. In fact, in Seoul, there is almost a second city underground with shopping areas in these underpasses and extending for blocks. Others, are just plain. I don't know what I would take a picture of - stairs going down.
Not very well thought through . . .