It is the incompletion if you travel to the north of Vietnam without a visit to absolutely marvelous Halong Bay region.
But it is not that simple. The region is not only inclusive of Halong Bay, but Lan Ha Bay.

This June Asia Pacific International Travel Company (APT Travel) has launched a new tourist attraction in Vietnam: The cruise of 4 stars The Viet Beauty. The ship, of style traditional Chinese rush, offers itineraries of 2 and 3 days in Halong Bay and Lan Ha Bay, declared Heritage of the Humanity for the UNESCO in 1994.

Taking a ride on a car or train for two hours from Hanoi to Haiphong, then on a high-speed vessel for another hour, visitors will arrive at Cat Ba Island, the biggest island (100km²) out of the 366 islands on the Lan Ha Bay.

Ha Long Bay, situated in the Gulf of Tonkin, includes some 1600 islands and islets forming a spectacular seascape of limestone pillars. Because of their precipitous nature, most of the islands are uninhabited and relatively unaffected by human influence.