In the Dong Van Karst Plateau Geopark, you leave Ha Giang following the bed of the valley to reach the Cong Troi Pass ("Heaven's Gate"), which marks the gateway to the far north of Tonkin. In the incomparable landscapes with peasant populations, you will notice thousands of black rocks scattered about the hills, pitons rising vertically, mountains covered with conifers and vegetables growing on terraces... A unique itinerary going as far as Yen Minh, where you can eat and get petrol.