Thien Son Cave is one of the notable attractions within the UNESCO-listed Phong Nha–Kẻ Bàng National Park. Located not far from the famous Phong Nha Cave, it offers a more relaxed exploration experience suitable for all visitors. The cave’s combination of accessibility and breathtaking scenery makes it a favorite destination for those who want to witness Vietnam’s underground wonders without intensive trekking.

The cave stretches for about one kilometer and features naturally formed stalactites and stalagmites of various shapes and sizes. The interior is illuminated by skillfully arranged colored lighting, highlighting the contours of the cave walls and giving each chamber a unique charm. Some parts shimmer under the lights, resembling crystals hidden deep within the mountain.

The name “Thiên Sơn,” meaning “Heavenly Mountain,” reflects the serene and majestic character of the site. From the entrance, visitors can admire a sweeping view of the winding Son River and the surrounding karst landscape. Stone stairways lead into the cave, where cool air and gentle humidity create a tranquil atmosphere throughout the year.

Thiên Sơn Cave is often part of a combined eco-tour itinerary that includes Phong Nha Cave and Thiên Đường (Paradise) Cave. The area features scenic walkways, rest spots, and panoramic viewpoints, making it ideal for families and nature lovers. It’s an excellent destination for travelers seeking a peaceful encounter with Vietnam’s natural beauty.

As of 2025, Thiên Sơn Cave remains a popular site among both domestic and international tourists. With careful preservation efforts, trained guides, and proper lighting systems, the cave continues to offer safe and memorable experiences. The development of sustainable tourism here not only supports local communities but also helps protect the pristine environment of Phong Nha–Kẻ Bàng National Park.

• From Hanoi, travelers can take a flight or train to Dong Hoi City, then continue by car for about one hour to Phong Nha–Kẻ Bàng National Park. Thiên Sơn Cave is located near Phong Nha Cave and can be reached directly by local shuttle bus or tourist boat from Phong Nha Pier.

• Wear non-slip shoes as the cave floor can be damp.

• Bring a personal flashlight in case of power interruptions.

• Visit in the morning to avoid large crowds.

• Best lighting conditions for photography are between 9 AM and noon.

• Ideal for travelers seeking a light nature experience.

Admission Fee

• Vietnamese visitors: Around 100,000 – 150,000 VND per person

• Foreign visitors: Around 200,000 – 250,000 VND per person

  Includes boat transfer and national park entry fee

Opening Hours

• Open daily: 08:00 – 17:00

• Some sections may be closed during the rainy season for safety reasons