The Km 0 milestone in Hà Giang city marks the symbolic starting point of the Ha Giang Loop - the road journey that heads north out of the city onto National Highway 4C, known locally as the 'Happiness Road' (Con đường Hạnh Phúc), through the Đồng Văn Karst Plateau toward the Chinese border. For the community of motorbike riders who travel the loop, this marker has become the traditional first check-in point - the moment before the journey begins in earnest.
The stone marker itself is a standard Vietnamese kilometre post, located on Nguyễn Trãi street in the Minh Khai ward of Hà Giang city centre - this same street also carries National Highway 2, which runs south toward Hanoi, so the marker sits at a meaningful junction between the way back and the way north. Its significance as a loop landmark is entirely symbolic: it is the line that riders cross to officially begin one of Vietnam's most celebrated road journeys.
The surrounding area in central Hà Giang city is also worth a morning walk - the city sits on the Lô River and has a compact old quarter with morning market activity.