From the hustle and bustle of Hanoi to the serenity of Hoi An, there's something for everyone in Vietnam. This Southeast Asian gem is brimming with culture, history, and natural beauty. If you're planning a trip to Vietnam, be sure to add these nine must-see attractions to your itinerary. 1. Halong Bay One of Vietnam's most iconic sights, Halong Bay is a UNESCO World Heritage site comprising more than 1,600 islands and islets. The best…