Beautiful, panoramic, breathtaking scenery of Ha Long Bay, aerial view during nice sunny day. H? Long Bay or Halong Bay (Vietnamese: V?nh H? Long) is a UNESCO World Heritage Site and popular travel destination in Qu?ng Ninh province, Vietnam. The name H? Long means descending dragon. H? Long Bay has an area of around 1,553 km2 (600 sq mi), including 1,969 islets, most of which are limestone. The core of the bay has an area of 334 km2 (129 sq mi) with a high density of 775 islets. 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.
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