Seongil Sundaeguk is a long-standing restaurant in Seoul that serves sundaeguk, bone haejangguk, and naejangtang. It sits near the alley in front of Hanyang University Hospital and the drinking street behind Wangsimni Station. The sundaeguk comes with a generous amount of meat and a rich broth, and the naejangtang is filled with plenty of offal. The restaurant has operated for a long time around the university area, and the shop sits in an alley narrow enough for one person to pass through.