Jangteo Son Kalguksu Hwangseongjeom is a kalguksu restaurant in Hwangseong-dong, Gyeongju. It serves only onkalguksu and naengkongguksu, with noodles made by hand and konggukmul and geotjeori prepared in the morning. At lunch the dining room fills up and a line forms, and food takes time to arrive after ordering. On days when ingredients run out, it closes between 2 and 3 p.m.