Observestalactites in miraculous form inside sung sot cave amazing cave one of the largest cavernsin halong bay during this 3 day cruise youll venture on board a vesselto lan ha bay and one of cat ba islands where you can relax on pristinesands kayak around the scenic bay go swimming at ti top island or even hike up for a panoramic view youll findplenty to do in thisunesco world heritage area includingcooking classes on board