Nakseongdae Udong in Nakseongdae, Seoul, is an indoor pojangmacha that serves ttaengcho udon and drinking snacks. The ttaengcho udon is the signature dish, and the chapssal tangsuyuk comes with a crisp batter coated in a sweet, sticky sauce. It stays open late, with takeout udon available even at midnight on weekdays, and there is a restroom inside the building. The selection of anju is limited.