Hang Kling – A Cu – Ruc Ca Roong is a pristine cave complex located within Phong Nha – Ke Bang National Park, in the limestone mountain forest area of Thuong Trach Commune, Quang Tri. This is a new exploration route for travellers who love trekking, caves, underground streams, primary forest and the indigenous culture of the Arem people.

Unlike popular attractions such as Phong Nha Cave or Paradise Cave, the Hang Kling – A Cu – Ruc Ca Roong journey is more experience-oriented: walking through the forest, crossing streams, exploring water caves, admiring stalactites and feeling the almost untouched wild beauty deep inside the core area of Phong Nha – Ke Bang.

Where are Hang Kling – A Cu – Ruc Ca Roong located?

This cave complex is located in the Arem Village – Thuong Trach area, within the core zone of Phong Nha – Ke Bang National Park. Travellers usually depart from central Phong Nha, follow Road 20 Quyet Thang, pass Hang Tam Co and Hang Co Y Ta, reach Arem Village and then begin trekking into the forest.

This is not a destination that can be reached independently by motorbike or private car all the way to the site. To explore Hang Kling, A Cu and Ruc Ca Roong, travellers need to join an organised tour with guides, a safety team and specialised equipment.

What makes the journey to Arem, Hang Kling, A Cu, Ruc Ca Roong and the Rocky Cypress forest so appealing?

The Arem community in Quang Binh

The Arem people are one of the long-established communities living in the limestone mountains of Phong Nha – Ke Bang, closely connected with forests, streams and caves. In the past, Arem life depended greatly on nature; at times, they lived in caves, relying on the forest for food, water and shelter. For that reason, Arem culture carries a very distinctive character: simple, quiet, deeply connected to the mountains and forests, and rich in valuable indigenous knowledge. When visiting Arem Village, travellers do not simply arrive at a stop on a trekking route; they touch a deep layer of cultural memory in Phong Nha. This place reminds us that the forest is not only scenery, but also a living space, history and identity of a community.

Arem Village is located along Road 20 Quyet Thang, in the inner buffer zone of Phong Nha – Ke Bang National Park

Rocky Cypress in Phong Nha – Ke Bang

The Rocky Cypress population (Calocedrus rupestris) in Phong Nha – Ke Bang National Park is a rare “living fossil”, covering more than one thousand hectares at an altitude of around 700 metres, with trees over 500 years old. This species often grows on rugged limestone cliffs, where soil is scarce, winds are strong and sunlight is intense, yet it still rises resiliently from the grey rock. That vitality creates a very distinctive beauty: ancient, enduring and quiet. Rocky Cypress is not only biologically valuable, but also contributes to the uniqueness of the karst ecosystem of Phong Nha – Ke Bang. In the old-growth forest, the image of tree trunks clinging to rock appears as a symbol of extraordinary adaptation. Looking at Rocky Cypress, we can better understand the beauty of nature here: not showy, but resilient, profound and full of life.

The Rocky Cypress population in the core zone of Phong Nha – Ke Bang National Park,

a “living fossil”, distributed on limestone mountains at an altitude of around 700 metres.

Hang Kling – An exciting experience

Hang Kling stands out with its wide entrance, large stone dome, natural sandy floor inside the cave and magnificent stalactite system. The cave space feels both majestic and open, creating the impression of a “limestone grand hall” hidden in the middle of the old-growth forest.

The appeal of Hang Kling lies in the combination of trekking, cave exploration and adventurous challenges. Travellers can admire stalactites, stalagmites, underground streams and take on the Arem Wall challenge, approximately 30 metres high, with support from the safety team.

Travellers experience Hang Kling, a unique way

to feel nature and the ancient life of the Arem people

What makes Ruc Ca Roong special?

Ruc Ca Roong is a water cave located near the Hang Kling area. It is a very appealing spot, with cool blue water, a quiet cave setting and activities such as swimming, stream bathing and more, depending on actual safety conditions.

If Hang Kling impresses visitors with its stone dome and stalactites, Ruc Ca Roong offers a refreshing, cool and deeply satisfying feeling after the forest trekking route.

Ruc Ca Roong brings a refreshing and relaxing feeling

Hang A Cu – An experience in the tropical forest

Hang A Cu usually appears in the 2-day-1-night itinerary. From the Hang Kling area, travellers continue trekking to reach Hang A Cu. This cave stands out for its quiet atmosphere, beautiful stalactites, natural stalagmites and a clear sense of untouched wilderness.

A Cu is ideal for those who enjoy geological exploration, cave photography and going deeper into the limestone cave system of Phong Nha – Ke Bang.

Hang A Cu stands out with its quiet atmosphere,

beautiful stalactites, natural stalagmites and a clear sense of untouched wilderness.

How long does it take to visit Hang Kling – A Cu – Ruc Ca Roong?

There are currently 2 popular options:

1-day tour: suitable for travellers with limited time who want to experience trekking, Hang Kling, Ruc Ca Roong, Hang Vom and Arem Village within one day.

2-day-1-night tour: suitable for those who want a deeper experience, with cave camping, exploration of Hang A Cu, the feeling of the night forest and the pristine atmosphere of Phong Nha – Ke Bang.

If you want a quick trip, choose the 1-day tour. If you want a more memorable and complete experience, the 2-day-1-night tour is the better choice.

How much does the Hang Kling – A Cu – Ruc Ca Roong tour cost?

Tour prices may vary depending on the travel period, number of guests and specific programme. Based on the current reference prices:

1-day Hang Kling – Ruc Ca Roong tour: from around VND 2,268,000 per guest, applicable for groups of 4 guests or more.

2-day-1-night Hang Kling – A Cu – Ruc Ca Roong tour: from around VND 6,426,000 per guest, applicable for groups of 2 guests or more.

Experiencing the cave life of the Arem people

Frequently Asked Questions

What is the best season to visit Hang Kling – A Cu – Ruc Ca Roong?

The most suitable time is the dry season, usually from around March to August. During this period, the weather is more stable, forest trails are easier to walk and water activities such as swimming, bathing and SUP paddling are more convenient.

During the rainy season, especially in months with heavy rainfall in Central Vietnam, the itinerary may be adjusted or temporarily suspended to ensure safety. Before travelling, visitors should check the weather and book through an experienced local operator.

Who is the Kling – A Cu – Ruc Ca Roong tour suitable for?

This route is suitable for travellers who love nature, trekking, cave exploration, new experiences and have good physical fitness. It is especially suitable for groups of friends, young travellers, international visitors, photography lovers, travel content creators or those who have already visited popular attractions in Phong Nha and want a more distinctive journey.

The tour is generally suitable for guests aged 12 to 60, who do not have cardiovascular, blood pressure, respiratory conditions or health issues that affect strenuous physical activity.

Should you visit Hang Kling – A Cu – Ruc Ca Roong independently?

No, independent travel is not recommended. This trekking and cave route is located in deep forest, with limestone terrain, streams, water caves and sections requiring safety equipment. Travellers should join a professionally organised tour with guides, porters, a safety team and suitable equipment.

Why choose Hang Kling – A Cu – Ruc Ca Roong?

Choose this journey if you are looking for a different Phong Nha experience beyond the familiar tourist routes. This place offers primary forest, water caves, stalactites, underground streams, Arem culture and a truly authentic sense of exploration.

This is not a destination for those in a hurry. Hang Kling – A Cu – Ruc Ca Roong is ideal for travellers who want to go deeper into the nature of Phong Nha – Ke Bang, where the beauty remains pristine, quiet and deeply captivating.

Phong Nha Viet.