Besides, the HA Long Bay is also home to high biodiversity with the typical ecosystems such as mangrove forest ecosystems, coral reef ecosystems, forest ecosystems of the tropical tree ... along with thousands of plant and animal species are extremely rich, varied.In 1994, UNESCO has officially recognized the HA Long Bay world natural heritage by the value of the landscape. In 2000, Ha Long Bay was the second UNESCO's world geological heritage because of the unique value of geology, geomorphology.
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