The area’s exceptional scenic beauty is a result of its limestone karst towers, now islands, which come in the form of spectacular pillars and are marked by a variety of coastal erosion features such as arches and caves which only add to the majestic natural scenery. Halong Bay has been recognized by UNESCO as a World Heritage Site twice, in 1994 and 2000. Cruises bring visitors to caves, beaches and lagoons, all amidst Halong Bay’s iconic and magnificent vistas.