Tam Dao National Park is a protected area zone in North Vietnam . It was established in 1996 , succeeding from The Conservation Forest Tam Dao which was formed in 1977 . The park is about 85 km northwest of Hanoi . Its exact location is at 21 ° 21 ’ to 21 ° 42 ’ North latitude , 105 ° 23 ’ to 105 ° 44 ’ East longitude . It spans a large area along the Tam Dao range and administratively belongs to 6 districts and 1 city : Lap Thach , Tam Duong , Binh Xuyen and the city of Vinh Yen of Vinh Phuc province ; Son Duong of Tuyen Quang province ; Dai Tu and Pho Yen of Thai Nguyen province . ( Cited from Wikipedia ) ( Photo by YS Kim )