Quang Binh tourism organizes an online knowledge contest about Son Doong Cave
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BY hackercong
- 30 Tháng Mười Một, 2018 7:23 sáng
- 1 comment
Located in Quang Binh Province in Central Vietnam, Son Doong Cave is considered to be the heart of the Phong Nha – Ke Bang National Park. The Cave was recognized as a UNESCO World…