Gyeonggi province surrounds the city of Seoul and one of the things I like about it is that the subway reaches Suwon (and Everland which is in Gyeonggi-do also)! For our last day on this trip, we visited all these sites in Gyeonggi that you might want to explore too! Part I is about Gwangmyeong Cave, which is located near The Grand Masterpiece Media Art Exhibit.
