The train arrives in Dong Hoi around 6:00 am. You are welcome by your guide and driver and have warm tea, coffee in town before an hour private transfer to Phong Nha for breakfast and shower, and will start to explore Phong Nha at 8:30 am. There is no cycling today, and we travel to Paradise Cave, through the mountain scenery through sub-national park forest, passing lakes, valleys on winding road rolling limestone mountains. The Paradise Cave is the destination must-see on your trip to Vietnam. Located in the spectacular Phong Nha-Ke Bang National Park, Quang Binh, recognised as a UNESCO World Heritage Site in 2003. Paradise Cave is home to 360-million-years-old rock formations. It's the World beautiful with a length of 31.4 km and the longest dry Cave in Asia. It offers the most natural landscapes in South East Asia. Then we continue our journey by vehicle through the limestone mountain range to a nice restaurant by the River to enjoy delicious lunch. After lunch, coffee and tea, we will discover the Dark Cave. It is located on the west Ho Chi Minh trail and by the fresh, clear river. Here is another adventure for you is the Zip-line to Dark Cave. Here is an excellent opportunity to discover the inner cavern with mud bathing and swimming on the clear freshwater River. Return to Phong Nha township to check in the hotel and dine with the team.