January
19.5°C ~ 67°F
19 days of rain
Crowds: Moderate
Dark Cave (Hang Toi)
A cave adventure with a zipline, kayaking and a mud bath.
- Location
- Phong Nha
- Time needed
- Half day
- Entry fee
- 350,000 VND
- Best months
- Feb – Aug
Overview
Dark Cave is known for its adventure package: a zipline across the river, a swim to the cave mouth, a visit inside with headlamps and a natural mud pool.
The experience is messy and fun, but the cave can close when the water rises.
Highlights
- Fly across the river on the zipline
- Swim into the cave with a headlamp
- Relax in the mud pool
- Kayak back along the river
Visitor information
| Opening hours | Daily, daytime; check at the ticket office |
|---|---|
| Entry fee | 350,000 VND per adult; includes zipline, kayak and mud bath (2026 guides) A separate Chay River – Dark Cave tour by an agency was quoted at about 254,000 – 450,000 VND depending on season |
| Time needed | Half day |
| Best time of day | Morning |
| Good for | Active travellers, groups, families with older children |
| Accessibility | Requires swimming and some fitness |
| Facilities | Changing rooms, showers, life jackets |
Prices and hours can change. Check the official source before you go.
Best time to visit
Weather in Phong Nha by month.
February
20.4°C ~ 69°F
16 days of rain
Crowds: Moderate
March
23.9°C ~ 75°F
15 days of rain
Crowds: Busy
April
27°C ~ 81°F
14 days of rain
Crowds: Busy
May
28.9°C ~ 84°F
18 days of rain
Crowds: Busy
June
30.6°C ~ 87°F
10 days of rain
Crowds: Moderate
July
29.7°C ~ 85°F
17 days of rain
Crowds: Busy
August
29.4°C ~ 85°F
17 days of rain
Crowds: Moderate
September
27.7°C ~ 82°F
23 days of rain
Crowds: Quiet
October
24.9°C ~ 77°F
27 days of rain
Crowds: Quiet
November
22.8°C ~ 73°F
24 days of rain
Crowds: Quiet
December
19.8°C ~ 68°F
22 days of rain
Crowds: Moderate
How to get there
- From Phong Nha centre
About 15 km from Phong Nha town; by scooter or tour.
- Dark Cave (Hang Toi)
Tips before you go
- Wear swimwear and bring spare clothes
- Keep valuables in the locker
- Check closures after heavy rain
- Follow the guide's instructions
Location
Phong Nha – Ke Bang National Park
More attractions in Phong Nha
FAQs
How much is Dark Cave?
About 350,000 VND per adult at the ticket office, with the main activities included (2026 guides). Agency tours cost more or less depending on the season.
Is it suitable for children?
Often for older children who swim; ask the operator about age limits.
Is it open in the rainy season?
It can close when the water is high.