Actually, this was itinerary of my first day in Seoul and because of I travelled from Indonesia and went to Hotel to check in first, so we (me and my friend) just had a half day for exploring Seoul. We arrived at Incheon International Airport at 8am, did our immigration checking, breakfast at airport, and finally arrived safely in our hotel in Myeongdong area at 13:00. So, we started exploring Seoul at 14:00. Our first location to be visited was Myeongdong Catholic Cathedral. We just need to walk 10 min. to go there from our hotel.