Sơn Đoòng is considered the world's largest caves that have been explored to date. This cave is located in Quang Binh province, Vietnam. Đoòng paint to large that can accommodate both high building to 40 storeys. Hang Shan Đoòng are a discovered local people for the first time in 1999. But not until 2009, when a British expedition into exploring the new world Đoòng Paint known this beautiful cave.
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