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To this day, scientists still cannot explain how the blue water color in the lake started from the beginning and why it is so blue.
Thuy Cung Cave is located in the cave system of Phong Nha - Ke Bang. Initially, Thuy Cung cave was also known as Nuoc Xanh cave.
Quang Binh
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Quang Binh
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Quang Binh
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Quang Binh
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Quang Binh
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