Gwanghwamun Station is a station on the Seoul Subway Line 5 in South Korea. It is not the closest subway station to the actual gate of Gwanghwamun, which it is named after. It is located next to the U.S. Embassy in Seoul.
This station boasts the most traffic of all Line 5 stations.
Wikipedia https://en.wikipedia.org/wiki/Gwanghwamun_station
Coordinates 37°34'17.818" N 126°58'36.849" E