Getting there: This month, Delta began nonstop service from Minneapolis/St. Paul to Seoul-Incheon, using the airline's newly refurbished 777 fleet (delta.com).
More info: South Korea's biggest tour operator, Hanatour (1-800-455-8965; hanatour.us), offers day trips with English-speaking guides in Seoul and the DMZ, as well as multiday itineraries covering multiple cities.
Korea Tourism Organization: english.visitkorea.or.kr/enu/index.kto
Seoul Tourism Organization: english.visitseoul.net/index