Nuguengaui Iyagi is a second-floor pub and cafe in Nampo-dong, Busan, on the path down from Yongdusan Park. It serves butter beer as its signature, along with draft beer, cocktails, and wine, plus pretzels and platters. Outdoor seating is available when you come down the deck stairs from Yongdusan Park, and the second floor is quiet and calm. The location is hard to find, and the stairs up to the second floor are difficult to climb.