Lang Son: The northern mountainous province of Lang Son is taking measures to preserve and promote the ecotourism value and potential of the Lang Son Global Geopark, recognised by UNESCO in September 2024. Spanning eight districts and cities, including Bac Son, Chi Lang, Huu Lung, Loc Binh, Van Quan, and Lang Son city (as well as parts of Binh Gia and Cao Loc districts), the Lang Son Global Geopark covers an area of over 4,840 square kilometres, with a population of nearly 627,000 people. This represents around 58% of the province’s area and 78% of its population.

According to Vietnam News Agency, the karstification process, combined with topographical, climactic, hydrological, and other conditions, has created a stunning system of massive limestone caves in the Lang Son Global Geopark. These caves contain numerous stalactites in various forms, most of which remain well-preserved.