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Ha Long Bay, literally: "
Descending Dragon Bay" is a UNESCO World Heritage Site, and a popular travel destination, located in Quang Ninh province, . Ha Long Bay, in the Gulf of Tonkin, has an area of around 1,553 km2, includes some 1,600 islands and islets, forming a spectacular seascape of limestone pillars.The limestone in this bay has gone through 500 million years of formation in different conditions and environments. The evolution of the karst in this bay has taken 20 million years under the impact of the tropical wet climate. Vietnam
The geo-diversity of the environment in the area has created biodiversity, including a tropical evergreen biosystem, oceanic and sea shore biosystem. 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.