Sumyeonok is a small naengmyeon restaurant between Eungam Station and Gusan Station in Yeokchon-dong, Eunpyeong-gu, Seoul. It serves only four items: hoe naengmyeon, bibim naengmyeon, mul naengmyeon, and mandu, with the noodles made in-house and served alongside onyuksu and buckwheat broth. The dining area holds about four or five tables, so there can be a short wait. Parking is difficult.