Haeju Naengmyeon, a restaurant with over 20 years of history, only serves two things: mul-naengmyeon and bibim-naengmyeon (types of chilled buckwheat noodle soup). Of the two types of soup, the restaurants is most well known for its bibim-naengmyeon, a dish so spicy that beads of sweat appear on the foreheads of customers as they savor their noodles. Ten different ingredients (chili peppers, garlic, and onions, etc.) are used to prepare this spicy dish and there’s even some extra chili seasoning at each table for those who can’t get enough spice. If you’re trying the bibim-naengmyeon you only need to add a small amount of sugar, mustard, and vinegar to the dish. If you’re eating the mul-naengmyeon, add a little bit of sugar and an ample amount of mustard and vinegar. Known for its cheap prices, generous servings, and delicious food, Haeju Naengmyeon is always full of people (particularly at peak hours). Due to the bustling crowds, water and beef broth are self-serve as the restaurant's staff tends to be very busy.