Halong Bay is another featured attraction that draws in a significant amount of Vietnam's visitors. You only have to travel a couple hours from Hanoi to catch a glimpse of the bay - a site that's the direct opposite of the chaotic streets found in the city. Also referred to as the Bay of the Descending Dragons, Uncornered Market noted that Halong Bay is one of Vietnam's most treasured natural wonders, surrounded by 2,000 limestone islands.