Hidden place · Lang Son, Vietnam
Limestone Caves of Lạng Sơn
Limestone caves across the province are associated with early settlers of the Bắc Sơn culture. The source says they were inhabited 7,000–9,000 years ago.
Hidden place · Lang Son, Vietnam
Limestone caves across the province are associated with early settlers of the Bắc Sơn culture. The source says they were inhabited 7,000–9,000 years ago.
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