Welcome on board La Regina Cruise – Queen of the Bays and start your delightful Halong Bay journey. A medley of limestone karsts, small islets topped rising from the calm emerald waters of the Gulf of Tonkin. The most-talked World Heritage site in Vietnam uncovered in the cruise route from Cat Ba island, through the magnificent Halong Bay and spectacular Lan Ha Bay. The scenery of thousands limestone islands is a visualization of ethereal beauty that La Regina Cruise would like to invite you to explore it with us. content.