Vietnam Cave Travel Guide: 5 Must-Visit Caves Every Tourist Should Visit

A Vietnam cave adventure can look very different depending on where you go. Some caves are easy to visit on a day tour, while others require days of trekking through dense jungle. Choosing the right one starts with knowing what each cave offers. In this guide, you'll discover five must-visit caves, along with the best time to visit, entry fees, difficulty levels, how to get there, and practical tips to help you plan your visit with confidence.

Why are the Vietnam Caves So Famous?

Vietnam’s caves are more than just beautiful; they are among the most remarkable in the world. Phong Nha-Ke Bang National Park, a UNESCO World Heritage Site, has over 300 caves stretching across 70 kilometers of underground passages. In the north, Halong Bay features limestone islands with hidden chambers that visitors can explore on foot or by boat. Whether you are looking for an easy cave visit or an adventurous Vietnam cave trek, the country offers an experience for every type of traveller.

1. Son Doong Cave, The Largest Cave in Vietnam (and the World)

Son Doong Cave in Vietnam is truly unique. Discovered by a local farmer in 1990, it soon attracted attention from around the world. The cave is about 9 kilometres long, with chambers as tall as 200 meters. It holds the record as both the biggest cave in Vietnam and the largest in the world. The space is so large that a skyscraper could fit inside. Inside, you’ll see an underground river, a jungle growing where the ceiling has collapsed, and even clouds forming deep below the surface.

• Best time to visit: January to August (cave closes September to December due to flooding)
• Trek difficulty: Very high, involves river crossings, a 90-metre wall climb, and dense jungle trekking
• Cost: Approximately USD 3,000 (~79,500,000 VND)
• Minimum age: 18 years
• Visitors per year: Limited to 1,000

Tribe Travel Tip: Son Doong Cave bookings fill up extremely quickly, with the entire 2027 season already sold out. If you miss out, Hang En Cave, also operated by Oxalis, is an excellent alternative.

2. Paradise Cave, Asia's Longest Dry Cave

Paradise Cave in Vietnam, also called Thien Duong, meaning 'Paradise', runs for 31.4 kilometres underground, making it the longest dry cave in Asia. Visitors can walk along a 1-kilometre wooden boardwalk through its most impressive section. No special skills are required, making it a family-friendly cave that offers a remarkable experience without the need for a full expedition.

• Best time to visit: April to August (dry season)
• Entry fee: 250,000 VND (~$10) per adult; 125,000 VND for children
• Getting there: 20 to 30 km from Phong Nha town by motorbike or taxi (~30–40 minutes)
• Difficulty: Easy, flat boardwalk with a 500-step climb to the entrance
• Time needed: 1.5 to 2 hours

Tribe Travel Tip: Try to get there before 9 AM if you want to avoid the tour crowds. It stays around 23°C inside the cave, so carrying a light jacket is a good idea, even on a hot day.

3. Phong Nha Cave, Vietnam's Ancient River Cave

Phong Nha Cave is one of the oldest and most important caves in the area. Found inside Phong Nha-Ke Bang National Park, it has served as a sacred Cham site since the 9th century, and ancient Cham inscriptions are still visible on its walls. Unlike Paradise Cave, you explore Phong Nha entirely by boat, gliding along an underground river while limestone columns tower around you in the soft light.

• Best time to visit: February to August (October to December can cause flooding and closures)
• Entry fee: 150,000 VND per adult; boat fee approximately 550,000 VND per boat (shared among up to 12 people)
• Getting there: Boats depart directly from Phong Nha town jetty, no advance booking needed
• Difficulty: Very easy; suitable for all ages and abilities
• Time needed: 2 to 3 hours, including the boat ride

4. Sung Sot Cave, The Most Famous Halong Bay Cave

Halong Bay caves in Vietnam are a highlight of nearly every cruise, and Sung Sot Cave is the most famous of them all. It is the largest cave in Halong Bay, covering more than 10,000 square meters. Located on Bo Hon Island, it is included in most cruise routes as part of Route 2.

• Best time to visit: October to April (cooler, drier weather); visit early morning on weekdays to avoid crowds
• Entry fee: ~300,000 VND (often included in cruise or bay tour tickets)
• Getting there: Reached by cruise or day boat from Ha Long City; 14 km from Bai Chay Tourist Wharf
• Difficulty: Easy; around 100 steps to reach the entrance
• Time needed: 45 minutes to 1 hour

5. Thien Cung Cave, Halong Bay's Heavenly Palace

Thien Cung means "Heavenly Palace," and it truly lives up to its name. Visually, it is one of the most stunning caves in Halong Bay. Spread across 10,000 square metres and divided into three chambers, the cave is filled with colourful stalactites illuminated by a carefully designed lighting system, making the entire experience truly captivating.

Unlike Sung Sot, Thien Cung can be visited on a day tour without an overnight cruise, which makes it a strong option for travellers spending just a day at Halong Bay.

• Best time to visit: October to April; early morning visits are quieter
• Entry fee: Sightseeing ticket ~290,000 VND + boat ~150,000 VND (total ~440,000 VND)
• Getting there: Day boat from Tuan Chau Harbour; also included in most overnight cruise itineraries
• Difficulty: Easy; some steps, but manageable for most travellers
• Time needed: 45 minutes to 1 hour

How to Get to Vietnam's Caves

The first step is to reach the right base city.

For Phong Nha caves (Son Doong, Paradise Cave, Phong Nha Cave):

• Fly into Dong Hoi Airport from Hanoi or Ho Chi Minh City (flights take about 1 hour)
• Alternatively, take the Hanoi–Ho Chi Minh City train and alight at Dong Hoi station
• From Dong Hoi, Phong Nha town is about 45 minutes by taxi or bus
• Motorbike rental in Phong Nha town costs around 150,000 to 200,000 VND per day for exploring independently

For Halong Bay caves (Sung Sot, Thien Cung):

• Travel from Hanoi to Ha Long City, around 3 to 4 hours by road or bus
• Most cave visits are packaged into overnight or day cruises booked from Hanoi or Ha Long City
• Overnight cruises generally give more cave access and are worth the extra cost for first-time visitors

Tips Before You Visit Vietnam's Caves

Preparing ahead of time makes the Vietnam cave visit much smoother.

• Shoes: You'll be walking on rocky paths and plenty of steps, so a pair of trainers or hiking shoes will make things much easier than sandals.
• Extra Layer: Even on a hot afternoon, caves stay surprisingly cool. A light jacket or overshirt is worth carrying.
• Local Currency: It's a good idea to keep some Vietnamese Dong with you, as card payments aren't accepted at many cave ticket counters.
• Bookings: Son Doong and Hang En tours are not available for long. If they're on your wishlist, book well ahead of your travel dates.
• What to Wear: Light, breathable clothes work best. Long sleeves are handy too, especially if you're trekking through forested areas.
• Protect the Caves: It can be tempting to touch the rock formations, but they're extremely delicate and take thousands of years to develop.

Takeaway

A Vietnam cave experience can be as easy as a short boardwalk through Paradise Cave or as challenging as a multi-day trek into Son Doong. No matter which one you choose, you'll witness landscapes that are unlike anywhere else in the world. Plan your itinerary around the season, travel time, and difficulty level to make the most of your visit. If you're looking to combine these caves with the best of Vietnam, Holiday Tribe's travel experts can help you create a customised Vietnam holiday package that suits your budget and travel style.