Seol Idong is a restaurant near Gwanghwamun in Seoul that serves cold, hot, and bibim kalguksu, along with mandu and ojingeo ueong jeon. The cold kalguksu comes with clear broth like naengmyeon and a seasoning sauce added later, while the hot kalguksu is served with meat and rice. The space has an open kitchen and windows facing a park, and reservations can be made through CatchTable. Food comes out quickly, and the wait gets long at lunch.