Bài này có phải là vt về kì quan thế giới ko ạ Ha Long Bay is in Quang Ninh province . It has many islands and caves . The islands are named after things around us ! In the bay you can find Rooster and Hen island ( Trong Mai Island)and even Mand's Head Island ( Dau Nguoi island ) . You must take a boat ride around the islands - it's essential ! Tuan Chau is the biggest island in Ha Long Bay . There you can enjoy great Vietnamese seafood . You can watch traditional dance . You can join exciting activitives. Ha Long Bay is Viet Nam's most beautiful naturnal wonder