Depart for Ba Be National Park, passing through the mountainous region of Tonkin - Thai Nguyen. There are superb landscapes with the rice fields and tea plantation in terrace, the paddle wheels in bamboo on the two sides of the river. Upon arrival at Cho Ra, take a boat on Nang river that slips in a cultivated country before penetrating in a landscape of chalky cliffs whose flank are characterized by small wild gardens, where hang the lianas and its long roots in quest of earth. Then enter into the Puong Cave. The river flows, making up a wonderful site where you can enjoy the stalactites on foot of this pothole. Continue going by boat to Pac Ngoi - a village of Tay ethnic. The Tay lives on fishing, rice and corn cultivation. Their stilt houses with the thatched roofs disperse in the austere surrounding landscapes. Have dinner and overnight at the inhabitant.