Ha Long Bay’s towering, rocky karst cliffs transport you to another universe. Shrouded in dense jungle growth, this UNESCO World Heritage Site bears isles of cavernous caves and turquoise lagoons. Sail through floating golden rice fields as you head up to the ethereal Ha Long Bay inland in Trang An at Ninh Binh. Like emperors of Dinh and Le dynasty, lunch in this ancient capital surrounded by jade-coloured grottoes and emerald rivers.