Ha Long bay, Halong information, Halong tours
The geological and geo-morphologic values of Ha Long bay are also shown by various caves that have been formed about 700,000 – 11,000 years ago under three main forms, namely
- The remnants of old phreatic caves: Sung Sot, Tam Cung, Lau dai, Thien Cung, Dau Go, Thien Long…
- Old karstic foot: Trinh Nu, Bo Nau, Tien Ong, Trong cave…
- Marine notch: BaHam lake, Luon Cave…
Tuan Chau Pearl Isle
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Đánh giá Kinds of cave in Ha Long, haiphongtours.vn