25/12/2017 at 10:11 (GMT) Theo dõi Vietnamhoinhap trên A boost to tourism development in Dong Van Karst Plateau Geopark VNHNVNHN – The PM has approved an overall tourism development plan in the Dong Van Karst Plateau in the northern mountainous province of Ha Giang. Theo Văn Phòng Chính Phủ