On your fourth day, take a day trip to Paoay, a town known for its UNESCO World Heritage-listed Paoay Church. Marvel at the unique architecture of this centuries-old church, characterized by its massive buttresses and distinct baroque style. Explore the Paoay Sand Dunes, where you can go sandboarding or take a thrilling 4x4 ride. Enjoy the scenic views of the sand dunes and the nearby coastline. In the evening, return to Vigan and relax at your accommodation.