Taesanbong Haejangguk is a hangover soup restaurant near Dongmun Market in Ildoil-dong, Jeju, serving beef hangover soup, offal soup, and jeongol. Its signature yanggomtang uses a rich, clean beef offal broth with chewy, tender offal. It opens early in the morning and gets crowded at lunch, with self-service side dishes and a pot of broth visible at the entrance. The yanggomtang now contains less offal than before.