Serenity Day Cruises Ha Long Bay- Lan Ha full day from Hanoi, in the Gulf of Tonkin, includes some 1,600 islands and islets, forming a spectacular seascape of limestone pillars. Most of the islands are uninhabited and unaffected by human presence. The site’s outstanding scenic beauty is complemented by its great biological interest. Meanwhile, Lan Ha Bay, just like Halong Bay’s twin beautiful...