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Interesting name of Ha Long Bay
It has an area of roughly 1500 square kilometres (579 square miles) on the northeast coast of Vietnam in the Gulf of Tonkin. There is no clear line between Halong Bay, Lan Ha Bay and Bai Tu Long Bay.
There are nearly two thousand tall, rocky islands located in the Halong bay. Nearly all of them are not inhabited.
Only less than half of the islands have been named, most of the names are based on the islands shape, for example Voi Islet (elephant), Ga Choi Islet (fighting cock), and Mai Nha Islet.
Many limestone cliffs have poetic names, based on their shape too. There are "kissing rocks", and the "elephant rock", "human face" rock and many others.
The unique islands are formed of limestone and schist, eroded over time to form large columns with some spectacular grottos and caves. Nearly all cruise boats visit Surprise Cave in Halong Bay.