Immerse yourself in the local culture on the fourth day of your trip. Start by visiting the National Museum of the Philippines, where you can admire a vast collection of art and artifacts that showcase the country's history and culture. Explore the vibrant neighborhood of Intramuros, known for its Spanish colonial architecture and charming streets. Take a traditional Filipino cooking class to learn how to prepare local delicacies. End the day by watching a cultural performance or attending a traditional dance show.