Halong Bay is Vietnam's number one tourist attraction.  Most people who visit the country have this destination at the top of their itinerary, and there are good reasons for this.  It’s beautiful. It’s so popular that in 2023, over 6.8 million people visited this UNESCO World Heritage Site.  Halong Bay is dreamlike, with over 200 rainforest limestone islands scattered around the emerald bay.  There could be no place like it.