Donggul Sikdang is an old restaurant in the dining area of Seonin-sangga, in the Yongsan-sangga area of Seoul, serving naengmyeon (cold noodles). Its yeolmu-naengmyeon uses dongchimi broth layered with sweet, salty, spicy, and sour flavors, giving it a character unlike typical naengmyeon. The Seonin-sangga dining area retains the old feel of the underground dining arcade in a former terminal building. The yeolmu-naengmyeon may taste unfamiliar if you expect the usual naengmyeon flavor.