Halong Bay (the bay where the dragon landed) is an inlet of the west coast of the Gulf of Tonkin in the South China Sea North Vietnam, including the sea islands of Halong City, Cam Pha town and part of island Van Don Quang Ninh.La center of a large area there are many factors at similarities in geology, geomorphology, landscape, climate and culture, with Bai Tu Long Bay and pants northeast southwest of Cat Ba island, Halong Bay limited area of ​​about 1,553 square kilometers including 1,969 large and small islands, mostly limestone islands, which are the core of the bay has an area of ​​335 km² 775 islands clustered dense knife. Tectonic history of the Gulf limestone spent about 500 million years to the ancient geographical circumstances are very different; and evolution Karst full year spent more than 20 million with a combination of factors such as thick limestone floors, hot and humid climate and tectonic processes improve the overall slow. The combination of environment, climate, geology, geomorphology, Ha Long Bay has made to become clustered biodiversity of ecosystems including evergreen and moist tropical and coastal ecosystems banks with more elementary ecosystems. 14 endemic plant species and 60 endemic species have been discovered among thousands of plant and animal populations Gulf residents.