Gyeongseong Sundaeguk is a large sundae-guk restaurant at Myeongbo Sageori in Seoul. It serves kimchi sundae-guk and sundae-guk with a heavy, rich broth, and the pi-sundae comes with head meat and offal. Food arrives quickly at lunch, and kkakdugi, onion, and buchu can be taken from a self-service corner. At lunch, staff service can be lacking.