Ha Long Bay which is located in the North-East of Vietnam is a UNESCO World Heritage Site, one of the world’s natural wonders, and is the most beautiful tourist destination of Vietnam. This bay, in the Gulf of Tonkin, includes some 1,600 islands and islets, forming a spectacular seascape of limestone pillars. Because of their precipitous nature, most of the islands are uninhabited and unaffected by a human presence. The site's outstanding scenic beauty is complemented by its great biological interest.
Its waters are host to a great diversity of ecosystems including offshore coral reefs, freshwater swamp forests, mangrove forests, small freshwater lakes, and sandy beaches. The folk tale has it that the dragons descended from heaven to help locals by spitting jewels and jade to the sea, forming a natural fortress against invaders; these precious stones are represented by the lush green outcrops. Several islands boast beautiful grottos and caves with contiguous chambers, hidden ponds and peculiar stone formations.
Although you can visit Ha Long Bay all year round, you would better plan your cruise carefully. Bad weather affects your vision and even spoils your trip. The best time to visit Ha Long Bay starts is from March to Jun, avoid crowded public holidays (30 April 30 and 1 May). June through September is low season so you can get better deals but pay attention to storm forecasts. October and November is high season again and it is still sunny. December is cool, cloudy but dry while January and February are cold, foggy and drizzly. The showers will hide the splendour of the bay.