Chi Lang Passage in Lang Son Province used to be a strategic bulwark for Vietnam and now boasts tourist attractions.
Chi Lang Passage is a narrow valley between the Bao Dai mountain range in the east and the Cai Kinh range in the west in the northern province. The mountains form two natural barriers.
Running zigzag along the valley is the Thuong River. Historical accounts show the valley was once regarded as an impenetrable barrier that keep out invaders from the north. King Le Dai Hanh (941-1005) once said the area helped destroy enemies no matter how large and powerful their armies were.
From Hanoi, you can follow National Highway 1A to get to the place. It stretches for around 20 km, with the main sights being Chi Lang and Quang Lang communes in Chi Lang District, Lang Son Province.
Bai Hao Lake, one of the sights…
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