Hang Sơn Đoòng
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Cave in Vietnam
Sơn Đoòng cave, in Phong Nha-Kẻ Bàng National Park, Bố Trạch District, Quảng Bình Province, Vietnam, is one of the world's largest natural caves.
Address: Tân Trạch, Bố Trạch District, Quang Binh Province, Vietnam