Nam Son Cave in Van Son commune, Phu Tho province. (Photo: VNA)
Nam Son Cave in Van Son commune, Phu Tho province. (Photo: VNA)
The jade-green lake inside Nam Son Cave never runs dry, remaining one of its enduring mysteries. (Photo: VNA)
The jade-green lake inside Nam Son Cave never runs dry, remaining one of its enduring mysteries. (Photo: VNA)
The “Fairy Well” inside Nam Son Cave, a small opening in the rock that continually releases fresh water, also never dries up. (Photo: VNA)
The “Fairy Well” inside Nam Son Cave, a small opening in the rock that continually releases fresh water, also never dries up. (Photo: VNA)
Nam Son Cave’s untouched landscape and hidden secrets make it an appealing destination for visitors. (Photo: VNA)
Nam Son Cave’s untouched landscape and hidden secrets make it an appealing destination for visitors. (Photo: VNA)
Inside Nam Son Cave, Phu Tho province. (Photo: VNA)
Inside Nam Son Cave, Phu Tho province. (Photo: VNA)
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Untouched beauty of Nam Son Cave in Phu Tho province

Nam Son Cave, also known as Ton Cave, is one of the most striking natural caves within the Ngoc Son – Ngo Luong Nature Reserve in Phu Tho province. Its pristine beauty, mysterious formations and geological value attract both scientists and travellers.