Vietnam is a country of sensory overload, but nowhere is this truer than in the far north. The Ha Giang Loop has become legendary among travelers, typically associated with the roar of motorbikes and the rush of exhaust. However, a quiet revolution is taking place on these limestone slopes. Ha Giang Loop cycling is emerging as the ultimate test of endurance and the purest way to experience the majestic Dong Van Karst Plateau.