Located in the heart of Phong Nha – Ke Bang National Park, the Chay River – Dark Cave is one of the most exciting adventure destinations in Central Vietnam. Combining pristine nature, thrilling activities, and unique cave exploration, this experience has become a must-do for travelers visiting Phong Nha in 2026.

Overview of Chay River – Dark Cave

Dark Cave was discovered in 1990 and later developed into an adventure tourism site. Stretching approximately 6 km, it is often described as a “mini Son Doong” thanks to its wild and untouched beauty.

Unlike many other caves in the region, Dark Cave remains largely unlit and undeveloped, offering a truly authentic exploration experience. Visitors will navigate through the cave using headlamps, walking, swimming, and even crawling through muddy passages.

The highlight of the cave is the natural mud bath deep inside, formed over time by mineral-rich sediments - perfect for relaxation and a fun, one-of-a-kind experience.

Meanwhile, Chay River impresses visitors with its crystal-clear turquoise water winding through dramatic limestone mountains. It creates a stunning backdrop for outdoor activities and adventure sports.

Top Experiences You Shouldn’t Miss

A visit to Chay River – Dark Cave is not just sightseeing - it’s a full adventure package:

• Zipline over Chay River: Experience one of the longest zipline systems in Vietnam (400m), offering an adrenaline rush as you glide across the river.
• Kayaking: Paddle along the peaceful river and enjoy the surrounding jungle scenery.
• Dark Cave exploration: Equipped with headlamps, venture deep into the cave and discover its raw, untouched beauty.
• Natural mud bath: Relax in the cool mineral mud pool inside the cave—fun, therapeutic, and unforgettable.
• Water activities: Swimming, water games, and obstacle courses on the river add even more excitement to your journey.

>>>Must-See Tours of the Chay River - Dark Cave

Reference Ticket Prices 2026

• Basic River Bathing Ticket: 150,000 VND/person
  Includes water games and kayaking.
• River Experience Ticket (Zipline): 220,000 VND/person
  Includes a long zipline across the river and recreational activities.
• Full Package – Dark Cave Adventure: 450,000 VND/person
  Includes zipline, cave exploration, mud bathing, kayaking, and all activities.

Children Policy:

• Below 1.3m: Free of charge (not allowed to join adventure activities such as zipline or mud bathing; can only use the kids’ pool or enjoy river bathing under supervision).
• From 1.3m and above: Charged as adults.

Travel Tips

• Bring swimwear, towel, and waterproof bags
• Wear comfortable clothes suitable for water activities
• Follow safety instructions from guides during zipline and cave exploration
• Suitable for adventure lovers and active travelers

With upgraded services, improved safety standards, and increasing international recognition, Chay River – Dark Cave continues to be one of the top adventure highlights in Vietnam. Whether you are traveling solo, with friends, or family, this experience offers the perfect mix of excitement and natural beauty.