- Hoanh Son Range
Hoành Sơn Range is a mountain range in
Bac Trung Bo ,Vietnam . The range runs fromAnnamite Range toSouth China Sea in southernHa Tinh province and northernQuang Binh province . It's the natural borderline of these two provinces. The length of this range is about 50 km. It crosses National Road 1A inNgang Pass .References
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