On day three, venture to the Vung Tau Back Beach, also known as Bai Sau. This beach is less crowded than the front beach and offers a more tranquil atmosphere. Spend the day sunbathing, swimming, or simply relaxing on the soft sand. If you're feeling adventurous, you can also try some water sports like jet skiing or paddleboarding. In the evening, enjoy a romantic beachside dinner while watching the sunset.