If you're planning to visit Vietnam, one destination that should be on your list is Ha Long Bay. It's not only a UNESCO World Heritage Site, but it's also one of the most beautiful natural wonders in the world. This article will guide you through everything you need to know about Ha Long Bay tourist attractions, the best time to visit.Ha Long Bay is known for its stunning natural beauty. It features thousands of limestone islands and islets in various sizes and shapes, forming an impressive seascape that stretches across 1,500 square kilometers. The bay's unique landscape was formed over millions of years due to tectonic movements, erosion, and other geological processes.