This are Gwanghwamun and Dondaemun Design Plaza(DDP) The reason why there two buildings are in there is, Gwanhwamun is one of the oldest building in Seoul, ans DDP is one of the newest building in Seoul. Gwanghwamun represent traditional and past, DDP represent modern and future. resultingly, Seoul is the road which connected traditional and modern. so I imagery Seoul like a road. and this road named Seoul is one of the great road for time and people.