Dedicate the fourth day of your trip to exploring the nearby city of Da Nang. Visit the iconic Dragon Bridge, which is known for its impressive design and nightly fire-breathing shows. Explore the Marble Mountains, a cluster of five limestone and marble hills that offer breathtaking views of the city and the coastline. Don't miss a visit to the famous My Khe Beach, known for its golden sand and clear waters. In the evening, indulge in some local street food and experience the vibrant nightlife of Da Nang.