In short
- Phong Nha is a river cave explored via a 30-minute dragon boat trip.
- The alternative is a 31.4-kilometer dry cave explored on foot.
- You can easily visit both in one day by booking a combo tour.
In this article
Both caverns sit inside the national park, but they offer completely different experiences. Phong Nha focuses on underground rivers. The other famous cave features massive dry walking chambers reaching up to 100 meters high.
What is the main difference between the two?
One is a wet cave navigated by boat, and the other is an enormous dry cave.
Phong Nha requires a 30-minute motorized boat trip on the Son River before paddling inside. The other cave is entirely dry. You take a buggy through the jungle and walk along a 1-kilometer wooden path.
How long does each take?
Budget around three to four hours for each cavern.
A trip to Phong Nha involves the boat ride, 40 minutes in the flooded section, and 45 minutes walking inside. Visiting the 31.4-kilometer dry cave takes a similar amount of time.
Which cave is better for kids or seniors?
Both are highly accessible, but Phong Nha requires less walking.
You sit in a dragon boat for the first half of the Phong Nha tour. This requires very little physical effort. The dry cavern offers buggies, but you still navigate stairs and a wooden walkway.
Do I need to choose just one?
No, you can easily visit both caverns on the same day.
Many guided tours combine both sites into a single 9 or 10-hour itinerary. These combo trips usually include transport from Dong Hoi, entrance fees, boat rentals, lunch, and a guide.
How do the rock formations compare?
The dry cave is larger, but Phong Nha has historic appeal.
The dry cave features towering limestone formations inside chambers up to 150 meters wide. Phong Nha is smaller but famous for drooping stalagmites at the massive 20-meter entrance.
Which one costs more to visit?
Phong Nha has a lower base ticket, but requires a boat rental fee.
An adult ticket for Phong Nha is 150,000 VND. You must also rent a boat for 550,000 VND. Up to 12 people can split this boat cost at the dock.
Questions travellers ask
Can I swim in either cave?
No. Swimming is strictly prohibited on standard tours of both caverns. You must stay in the boat or on designated walkways.
Are both caves open year-round?
The dry cave generally stays open safely. Phong Nha often closes between September and November due to dangerous flood levels.
Where do tours start?
Phong Nha trips start at the central dock in town. Tours for the dry cavern start at its specific entrance deeper in the park.
