January
14.3°C ~ 58°F
12 days of rain
Crowds: Busy
Tam Thanh Cave
A limestone cave with a temple and a rock said to resemble a woman and child, To Thi.
- Location
- Lang Son
- Time needed
- 30 – 60 min
- Entry fee
- 20,000 VND
- Best months
- Oct – Nov
Overview
Tam Thanh Cave is a limestone cave with a Buddhist temple in the hill beside the To Thi rock. A short path leads into the cave through chambers and up stairs, and the pagoda is also known as Thanh Thien. It is the best-known sight in Lang Son.
The cave shares its approach with Nhi Thanh and the Mac citadel, so many visitors do all three together. Visitors report about 20,000 VND for adults and 10,000 VND for children, which is not confirmed for 2026.
Highlights
- Walk through the chambers of the cave
- Visit the temple inside
- See the To Thi rock nearby
- Combine with Nhi Thanh Cave and the Mac citadel
Visitor information
| Opening hours | Daily. Hours not confirmed. |
|---|---|
| Entry fee | About 20,000 VND for adults and 10,000 VND for children (reported by visitors; confirm) |
| Time needed | 30 – 60 min |
| Best time of day | Morning |
| Good for | Families, culture lovers |
| Accessibility | Steps and wet floors |
| Facilities | Toilets, souvenir stalls |
Prices and hours can change. Check the official source before you go.
Best time to visit
Weather in Lang Son by month.
February
15.4°C ~ 60°F
11 days of rain
Crowds: Busy
March
19.4°C ~ 67°F
13 days of rain
Crowds: Moderate
April
22.7°C ~ 73°F
13 days of rain
Crowds: Moderate
May
25.2°C ~ 77°F
20 days of rain
Crowds: Quiet
June
27.1°C ~ 81°F
22 days of rain
Crowds: Quiet
July
27.2°C ~ 81°F
22 days of rain
Crowds: Quiet
August
26.4°C ~ 80°F
25 days of rain
Crowds: Quiet
September
25.5°C ~ 78°F
19 days of rain
Crowds: Moderate
October
22.2°C ~ 72°F
12 days of rain
Crowds: Moderate
November
19.2°C ~ 67°F
8 days of rain
Crowds: Quiet
December
14.9°C ~ 59°F
7 days of rain
Crowds: Quiet
How to get there
- From Lang Son centre
In Lang Son city, beside the To Thi rock. Most visitors walk or take a short taxi ride.
- Tam Thanh Cave
Tips before you go
- Go in the morning
- Wear shoes with grip for the stairs
- Combine with Nhi Thanh and the Mac citadel
- Dress modestly at the temple
Location
Lang Son city
More attractions in Lang Son
FAQs
How much is the ticket?
Visitors report about 20,000 VND for adults. Confirm at the gate.
How long do I need?
About 30 – 60 minutes.
What is To Thi?
A rock said to resemble a woman and child.