If you are the tourists who are not interested in history could join this tour. Either Changdeokgung Palace or Gyeongbokgung Palace is very famous and popular from Korean drama. The palace is majestic with its design and story. N tower is the symbol mark for Seoul. Compare to the night view from Seoul tower, day time view will be totally different. You could take lots of picture at the park and look around downtown more clearly. Since the local guide will be with you all the time therefore if you have any questions with the places, you can keep asking and gain knowledge as much as you could.