Tien cave is situated in Cao Quang commune, Tuyen Hoa district, Quang Binh province, fascinating those who love natural wonders and exciting experiences (Photo: Oxalis Adventures)
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The entrance to Tien cave 1 (Photo: Oxalis Adventures)
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Tien cave 1 is highlighted by piled-up stalactites (Photo: Oxalis Adventures)
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Tien cave 2 is the last part of Tu Lan cave system, located outside Phong Nha - Ke Bang National Park. It boasts 2,519m in length and the maximum depth of 94m below ground surface (Photo: Oxalis Adventures)
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Majestic beauty of Tien cave 2 (Photo: Oxalis Adventures)
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VNA/Oxalis Adventures