Gwangyang Haejangguk is an old restaurant near Jeju City Hall that serves haejangguk, naejangtang, and ppyeodagwi haejangguk. The naejangtang uses Korean hanwoo intestines and finely sliced radish in a light, clean broth. It is open from 6 a.m. to 3 p.m. and has a large parking lot with both table and floor seating. There is no evening service, so you have to go before 3 p.m.