Phong Nha-Kẻ Bang National Park | Vietnam

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Phong Nha-Kẻ Bang is a national park and UNESCO World Heritage Site in the North Central Coast region of Vietnam, about 500 km south of Hanoi. The park is noted for its 300 caves and grotto systems.

The Hang Tien, or Fairy Cave, is famed for its enormous size and spectacular formations.