Halong Bay is one of the most famous attractions in Vietnam and is also the world heritage site. Before the highway opened, it took a long time to get to Halong bay and visitors can't see very much, nowadays most of the cruises going on the highway, it take around 2 hours and visitors will have more time to visit the bay. Most visitors will go route 2, which can visit the route 2 days 1 night within one day.
