Beef noodle soup, also known as Pho Bo, is a popular Vietnamese dish that can be found in Halong. The soup is made by simmering beef bones, spices, and herbs for hours to create a flavorful broth. Thinly sliced beef is then added to the broth, along with rice noodles and garnishes such as bean sprouts, basil, and lime. The result is a comforting and hearty soup with tender beef and flavorful noodles. Beef noodle soup is a must-try dish for meat lovers visiting Halong.