Halong bay belongs to Quangninh province in the Northest of Viet Nam. Halong bay consists of a thick cluster of 3000 limestone islands, each island has thick jungle vegetation on its top, which rise amazingly from the ocean. Halong Bay's limestone islands are spreaded with caves of multy sizes and shapes. Most of these can see only by boat, but some can easily be visited inside. There is a legend about Halong bay. It was when Vietnam was invaded by the neiborhood country. The Jade Emperor sent the a Dragon and her childs to help the Viet people battle the invaders. The Dragon mother and childs puffed out a lot of pearls to attack the enermies. Then the invader’s boats exploded to hundereds of pieces. All the pearls, after the battle, transformed into limestones. When the invader was lost, Mother Dragon and her Child Dragons didn’t return to Heaven but stayed right at the place that the battle occurred. The place where the Mother Dragon alighted was Ha Long, and where the Child Dragons lied down was Bai Tu Long. Halong bay was regconized World Natural Henritage by UNESCO.