Just did even more Wikipedia trivia gathering on South Korea.
There are lots of fine museums, both within Seoul and throughout the rest of the nation. Wikipedia has a great list of these museums, including ones I hadn't even thought of.
These alone could eat up most of my free time, so I better pick and choose carefully. For now, the Bank of Korea Museum looks good, as I love collecting foreign currencies. Another museum worth a visit may be the one dedicated to Dosan Ahn Chang-ho, who fought the Japanese colonial rule; he spent much of his life in San Francisco and Riverside, California, and the I-10/I-110 freeway interchange in downtown Los Angeles is named after him. And speaking of resistance to the Japanese, the Independence Hall may also be worth a visit, despite its location in faraway Cheonan. Hoam Art Gallery at Everland will also be a good pick for traditional Korean art.
I'll be checking through a lot of the listed websites to determine which ones are worth my time and money.
Wikipedia