On your second day, embark on an exciting outdoor adventure on Hon Khoai. Start your day with a hike to the island's highest peak, where you can enjoy breathtaking views of the lush greenery and rugged cliffs. Afterward, explore the island's caves, such as Hang Pagoda and Hang Duong, which are known for their stunning stalactite formations. If you're feeling adventurous, you can also go snorkeling or scuba diving to discover the vibrant marine life that surrounds the island. In the evening, relax on the beach and enjoy a delicious seafood dinner.