On the fourth day, immerse yourself in the rich history and culture of Ilocos Norte. Visit the Malacañang of the North, the former official residence of the Marcos family. Explore the well-preserved rooms and admire the beautiful lake view from the balcony. Next, head to the Museo Ilocos Norte, which showcases the heritage and traditions of the Ilocano people. Learn about the region's history through various exhibits and artifacts.