Suudong is an udon restaurant in a small alley at the edge of Hyeopjae Beach, looking out over Biyangdo and the sea. Its signature house-made cold udon is served with chewy hand-pulled noodles and chilled broth, alongside hot udon, tonkatsu and fried dishes. A reservation through CatchTable one day in advance gets you in at your chosen time with no wait, while without one you write your name on the spot. The food and the view are good, but the prices run high.