Ha Long Bay is a 1,600-island archipelago located in the Gulf of Tonkin. The limestone pillars are forming a magnificent seascape. Most of the islands are deserted and undisturbed by human presence due to their precipitous nature. The site’s stunning natural beauty is complimented by its rich biological diversity. It has always been a famous tourist destination and is possibly Vietnam’s most visited UNESCO World Heritage Site. Image by Erik Karits from Pixabay