January
14.3°C ~ 58°F
12 days of rain
Crowds: Busy
The remains of a 16th-century Mac dynasty citadel on a hill above the city.
The Mac dynasty citadel in Lang Son is a hilltop fortification from the sixteenth century, with remaining walls and gates and views over the city. It is part of the same cluster as the Tam Thanh and Nhi Thanh caves.
Come in the late afternoon for the light and a cooler walk up. A visit takes 30 to 45 minutes.
| Opening hours | Open-air site; go in daylight. About 100 steps lead up to the gate. |
|---|---|
| Entry fee | No entrance fee found in guides checked for 2025 – 2026; the citadel remains are an open site. Ask locally. |
| Time needed | 30 – 45 min |
| Best time of day | Late afternoon |
| Good for | History lovers, photographers |
| Accessibility | Steps up the hill |
| Facilities | Limited |
Prices and hours can change. Check the official source before you go.
Weather in Lang Son by month.
14.3°C ~ 58°F
12 days of rain
Crowds: Busy
15.4°C ~ 60°F
11 days of rain
Crowds: Busy
19.4°C ~ 67°F
13 days of rain
Crowds: Moderate
22.7°C ~ 73°F
13 days of rain
Crowds: Moderate
25.2°C ~ 77°F
20 days of rain
Crowds: Quiet
27.1°C ~ 81°F
22 days of rain
Crowds: Quiet
27.2°C ~ 81°F
22 days of rain
Crowds: Quiet
26.4°C ~ 80°F
25 days of rain
Crowds: Quiet
25.5°C ~ 78°F
19 days of rain
Crowds: Moderate
22.2°C ~ 72°F
12 days of rain
Crowds: Moderate
19.2°C ~ 67°F
8 days of rain
Crowds: Quiet
14.9°C ~ 59°F
7 days of rain
Crowds: Quiet
In Lang Son city, close to the Tam Thanh and Nhi Thanh caves.
Lang Son city
A sixteenth-century hilltop fortification.
About 30 – 45 minutes.
Yes. It is part of the same cluster.