Indulge in Vigan's culinary delights on the fourth day of your trip. Start your day with a hearty breakfast of Vigan longganisa, a local sausage specialty. Visit the Vigan Public Market to sample various local delicacies like bagnet (crispy pork belly), empanada (a savory pastry filled with meat and vegetables), and sinanglao (a traditional soup made with beef innards). Don't forget to try Vigan's famous vinegar, made from sugarcane and fermented in clay jars. In the evening, enjoy a traditional Vigan-style dinner at one of the city's heritage restaurants.