Drive the Con Noi causeway out onto a sandbank in the Gulf of Tonkin

This is a motorbike or car trip rather than a tour, and own transport is essential. The point is the drive across open water with fishing stakes on both sides, and there is a working fishing community rather than a resort at the far end. Tide matters, both for the beach and for what the flats look like. Summer for swimming, though the water is silty; the drive is better in clear winter light. Exposed and windy. Come at the end of a Kim Son day that started at Phat Diem and the sedge villages.