Lang Son is in the region of Lang Son Province, in Vietnam.
Lang Son Province is located in the northeast region of Vietnam and shares its border with China. The province is known for its stunning natural beauty, historic sites, and unique culture. Visitors can explore the majestic karst landscapes of Tam Thanh Cave, trek through the rugged mountains in Huu Lien Nature Reserve, and wander through the bustling markets in Lang Son city. The province is also home to several ethnic minority groups, including the Tay, Nung, and H'mong people, where visitors can gain insight into their customs and traditions.