Heojun Museum is dedicated to Heo Jun, the Joseon-dynasty royal physician who compiled the Dongui Bogam, one of the defining texts of Korean traditional medicine. Exhibits cover his life, medical writing, and the wider history of Korean medicine.
The museum is most worthwhile for visitors interested in Korean history beyond palaces and dynastic politics. It is in western Seoul, so combine it with other Gangseo-area stops rather than treating it as a quick central-city museum.