Lạng Sơn

Lạng Sơn is the historic gateway between Vietnam and China — the road, the railway and the wars have all run through here. The Hữu Nghị Pass ("Friendship Pass") above Đồng Đăng is where the 1979 Sino-Vietnamese war started, and the main land trade route between the two countries still moves through this city. Few tourists visit. The ones who do are usually crossing the border or making a short detour from Cao Bằng.

What to see

Hữu Nghị border gate. 18 km north of Lạng Sơn city. The largest land crossing between Vietnam and China. Open to international tourists; you need a Chinese visa in advance (Vietnam's e-visa only covers your side). The Hanoi–Beijing through train no longer runs, but a Hanoi–Đồng Đăng train continues to operate.

Đông Kinh and Kỳ Lừa markets. The city's main markets, full of Chinese-imported electronics, clothes and toys. Loud, busy, more interesting as a sociological observation than as shopping.

Mẫu Sơn. A small upland resort 30 km east of the city, 1,500 m above sea level. The only place in Vietnam where snow is even a faint possibility; it has fallen perhaps a dozen times this century. French colonial-era villas (mostly ruined), pine forests and Dao villages on the slopes. The Mẫu Sơn rượu (rice wine distilled by Dao communities) is genuinely good.

Tam Thanh and Nhị Thanh caves. Show-caves with temples inside, on the western edge of the city. Worth an hour if you are in town.

Đồng Đăng. The actual border town, more interesting than Lạng Sơn city itself — busy with cross-border trade and the rail terminus.

How to get there

From	Mode	Time
Hanoi	Train (HN–Đồng Đăng)	4–5 hours
Hanoi	Bus from Mỹ Đình	3.5 hours
Hanoi	Limousine	3 hours
Cao Bằng	Bus	3 hours

The train is more pleasant than the bus for the slow climb out of the delta; the limousine is fastest.

When to visit

Months	Notes
Oct–Nov	Best weather, crisp and clear
Dec–Feb	Cold (5–15°C); Mẫu Sơn occasionally freezes
Mar–May	Plum and peach blossom in the hills
Jun–Sept	Hot, humid, frequent thunderstorms

Where to stay

Mường Thanh Luxury and Vi Sense are the two reasonable hotels in the city (US$45–80). For Mẫu Sơn, several Dao-run homestays around US$25 with meals; one ageing French villa hotel up top.

Food

Vịt quay (roast duck) Lạng Sơn-style is marinated with mắc mật leaf — a citrus-aromatic local herb — and roasted until lacquered. The signature dish. Phở chua (sour pho) is the regional pho — cold rice noodles, roast pork, peanut, herbs and a sweet-sour dressing rather than hot broth. Both worth seeking out at Quán Vịt Quay Hương Nga or any of the duck restaurants along Bắc Sơn street. See northern cuisine.

Honest take

Lạng Sơn is for people crossing to China, doing the Hà Giang → Cao Bằng → Lạng Sơn → Hanoi northern loop, or specifically interested in the border-trade economy. It is not a destination on its own. If you are simply touring north Vietnam, skip it and go to Cao Bằng instead.