The Ha Giang Loop in Vietnam's extreme north is the most dramatic 320 km circuit in Southeast Asia — narrow mountain roads clinging to limestone karst peaks, canyon viewpoints that seem computer-generated, and villages unchanged for centuries. Day 1 climbs to the UNESCO-listed Dong Van Rock Plateau via the legendary Ma Pi Leng Pass and the Nho Que River canyon. Day 2 loops north to Lung Cu (Vietnam's northernmost point) and back through Meo Vac. Day 3 descends through the Du Gia valley on a completely different road back to Ha Giang. Ride a semi-automatic 110cc or 125cc — the roads are narrow, steep, and absolutely spectacular.
Clone it to your planner, customize dates and stops, then ride. All free.