I remember the day. It was the 14th of October 2017 and we had walked up to the Namsam Seoul Tower. It was a very warm day and as you can see the sky was clear blue so we had good views of the city from this point.
It is a place where many people place their “Locks of Love” but in this case it seemed as if there were more of the plastic hearts rather than the metal locks. This might be because when there are a large number of locks they cause damage to whatever they are locked on to. This happened in Paris I seem to remember.
If you are going to Korea then a walk up to the tower is definitely worth doing.