Recommendation by Jica Simpas
HUGE museum. They also have large antique collections from different countries at the top floor. If you're into museums, you can easily spend an entire day (or two) here. Trust me, a few hours isn't enough. Side-note: I'm such a sucker for gift/souvenir shops, and they have some great stuff here.
Open today: 10:00-21:00
137 Seobinggo-ro, Seobinggo-dong, Yongsan-gu, 서울특별시 South Korea