Stop at one of the first major viewpoints when travelling north from Ha Giang city: Quan Ba Heaven Gate. Located at a high point on the road, it offers stunning panoramic views over the Tam Son valley and the surrounding karst landscape, marking the entrance to the Dong Van Karst Plateau Geopark.

Nearby, don't miss the view of the Quan Ba Twin Mountains (Fairy Breast Mountains), two striking, perfectly rounded hills rising from the valley floor, steeped in local legend. It's a classic Ha Giang photo spot.