After breakfast, we do check out and will commence the morning adventure from the hotel. Phong Nha rural villages and surroundings are natural, peaceful countryside. We first ride through the most beautiful natural landscapes; mountain karst landscapes and tropical forest. Next, continue cycling on concrete paths, passing lush foothill farmlands, and making some stops to view the peaceful villages. Enjoy riding down the small trails through rice paddy fields. Followed by cross Ho Chi Minh trails, the routes are narrow pathways through rubber plantations, vibrant villages along the mountain's foot, and small local markets before we get to the high road where we stop to ride for a transfer 2.5 hours Vinh Moc tunnels.

Vinh Moc tunnel was built and located by the sea in Quang Tri province and not far from Ben Hai River- Hien Luong Bridge. The boundary between North and South Vietnam from 1954 to 1975.  The divided line was 76.1 km long and crossed from east to west near the Dong Ha City, Quang Tri Province. Upon arrival at the Vinh Moc, take a locally guided tour to visit the living tunnels. Then take a pleasure ride, 20 km on the coast from the tunnels, pass stunning Cua Tung beach, then pedal on a rural road along the famous Ben Hai River to Hien Luong Bridge. Visit Hien Luong Museum before a walk on Hien Luong Bridge. The bridge over Ben Hai River, located on the 17th Parallel, was a boundary during Vietnam. Then we'll transfer to Dong Ha City to check in at the hotel in the late afternoon.