Legend said it that in the early era of Vietnam, the country had to fight against powerful invaders. To help Vietnamese people save their country, a family of dragons was ordered by the godto assist them. Dragons spitted out various jewels and jades to form a long and solid citadel. Therefore, the invaders had to give up their invasion plot and sailed their ships back.
After the war, the family of dragons stayed on the Earth as beautiful and peaceful scenery there. The bay, where the mother dragon descended, was named halong bay(Dragon Descending Bay). And the bay where the dragon’s children descended was called Bai Tu Long Bay. Nowadays, variety of islets on Halong Bay is said to be petrified jewels and jades that the dragons spitting out. The island range of Bach Long Vi is considered as the trail of dragon’s tail on the sea.