Seodaemun Prison History Museum is just one of the attractions in Sinchon-dong, Seoul so you might want to stop by during your trip. You could also start your cultural experience by heading over to the museums in the area. It's also full of great shops and restaurants, so you can spend the afternoon having a wander. If you want to experience more of the culture Seoul has to offer, head to Supsok Hanbang Land, Ewha Woman's University, and Gwanghwamun.