Ha Giang Loop 4 Days Trekking Tour in Dong Van Karst Plateau Global Geopark, We will have a great time trekking in a beautiful area, visit Couple Mountain, Happy Road, Rice Terraced Mountains, Red Dao culture, Hmong culture, Lolo culture, Local Homestay, Hmong King Palace, Lung Cu village the northernmost point of Vietnam marked with a tall flag tower on top of Dragon Mountain, Ma Pi Leng pass, local markets.