Situated in the north-east region of Vietnam, Ha Long Bay Vietnam is a part of the Gulf of Tonkin, and comprises Ha Long City, the township of Cam Pha and a part of the island district of Van Don. To the south-west it borders the island of Cat Ba island, to the east is the sea and the mainland follow a coastline of 120 km. It stretches between the 106º58 and 107º22 eastern meridians and the 20º45 and 20º50 northern parallels Read more > >