The National Folk Museum sits at the back of Gyeongbokgung and you really can't miss the large pagoda. To be honest I had little desire to come here, but because I stayed nearby and its free, I thought I might as well. The pagoda is a landmark in Seoul and has featured on many a tourist literature. There are some old buildings that have been moved here, as have some Jangseung (totom poles) and there's a small street that illustrates what South Korea was like decades ago. The museum is quite nice and the exhibits are well presented. There's a children's museum which I didn't go to. Contents include general Korean culture and life in the Joseon Dynasty. There is some overlap with other museums and attractions in Seoul. Similar items can be seen at the National Palace Museum which is also on the Gyeongbokgung grounds and the National Museum of Korea. In terms old old hanoks, there is the Namsan Hanok Village. So the National Folk Museum is like the greatest hits of korean museums in terms of culture. If you don't have the time to visit them all. Visit the National Folk Museum. I'd definitely go again.