Ikseondong(in Korean, 익선동) is now top trending area for young Seoul locals. It was a old village of Hanok (Korean style housing) for hundreds years, now renovated in creative and amazing style. You can discover the creativity of young Koreans in there.
In Ikseondong, you can find out real nice and kind of 'hipster' style shops, restaurants, and bars. Also cool cafes serves nice coffee, dessert and amazing interior. If you want to catch a trend of young Koreans in real time, try to be a part of it.
Lighting in nighttime is so beautiful.