Ha Long Bay, in the Gulf of Tonkin, includes some 1,600 islands and islets, forming a spectacular seascape of limestone pillars. Because of their precipitous nature, most of the islands are uninhabited and unaffected by a human presence. The site's outstanding scenic beauty is complemented by its great biological interest.
- Viet Nam 1984. Rock Formations in the Ha Long Bay. The term "Buu Chinh" on all Vietnamese stamps means "postage". All stamps shown are issued in 1984. The set exists also in an imperforate version.
