Great posters from around Seoul

As I go around Seoul on my day to day work, I often come across some excellent, and some not so excellent posters. As a person who loves design, I often quickly take out my iPhone and take a picture (much to the bemusement of many of my fellow passengers) 

Here few of the posters I have seen recently that I really like. The first three are for the same company. I love the simple blue background and the black and white images. And the last picture, to me, is fantastic. So simple, yet the image really does capture the emotion.

Garr Reynolds recommends in his latest book Presentation Zen Design to look around your environment when travelling around, and I completely and 100% agree with this.