Dedicate the fourth day to immersing yourself in the local culture of Pagburnayan. Visit the Museo Ilocos Norte, a museum that showcases the history, art, and culture of the Ilocos region. Learn about the traditional crafts, costumes, and rituals of the locals. Participate in a traditional dance or music workshop to experience the vibrant culture firsthand. In the evening, attend a cultural performance or festival if there is one happening during your visit.