Today you’ll encounter the most mind-blowing stretch of road in Vietnam. We cycle to Dong Van,  Karst Plateau Global Geopark is located in the northeastern province of Ha Giang, a mountainous region located in the far north of Viet Nam. Most of its surface is limestone (about 60%). Its landscape is spectacular and unique, having high mountains and deep canyons. Then, we ride rolling hills and speed up gentle hills to Ma Pi Leng Pass, and the valley floor drops far below as you wind through massive peaks and canyons. The only problem may be the number of stops you feel compelled to make, as every turn is full of picture-perfect views. After lunch, we continue the day to Meo Vac is only 24 kilometers from Đồng Văn, but it will take most of your morning to reach it if you stop to appreciate the panoramic views along the way.