To start off (since I had just uploaded a photo that I took at the same place for my header and hence, looking at the same album at the moment too), here’s a scene I snapped at the top of Seoul Tower.
Those are lockets bearing the names of the couples who placed it there. Apparently the belief is that the couples will stay together as long as the lockets remained locked at this railing. Seems like there are a lot of couples who visited Seoul Tower who are ready to be committed to their partners in the long run. On the other hand, these locks could also signify that there are a lot of couples out there who are insecure about their relationships till they have to resort to something tangible to cement the intangible.