Kaverno Thien Duong
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Kaverno Thien Duong, Phong Nha-Ke Bang.
Kaverno Thien Duong esas kaverno en nacionala parko Phong Nha-Ke Bang en Quang Binh provinco, Vietnam, 60 km norda de Dong Hoi, 54 km suda de Dong Hoi aeroportuo, 450 km suda de Hanoi. [1][2][3]