After breakfast, we travel by vehicle to Paradise Cave; after exploring the cave, we'll transfer to the west Ho Chi Minh, road 15; it winds through jungles and tiny minority villages of Ban Doong, Xu Bien, and Khe Cat. We'll challenge some big and gentle hills, undulating along the sleepy rivers. It's an opportunity to admire the breathtaking mountain landscape and stunning ethnic villages on spiral roads through the Truong Son mountain ranges. We'll finish the day ride at Zin Zin Bridge, about 65km. Then we hope on the vehicles for a transfer to Dong Ha in the late afternoon.