Hyekalguksu is a noodle shop near the Hyehwa-dong rotary that serves Andong-style guksi with suyuk and fried fish. The broth has a sagol character, light and lightly salted, and the thin, soft noodles come as a full bowl for guksi or a half bowl for sari. The restaurant has been in operation for 30 years and the interior has been renovated. At noon on a Sunday there was no wait, while the shop is crowded during meal times.