PPC Management Board of the Phong Nha - Ke Bang monitor and supervise the test harness, as the basis of a specific assessment of potential, attractiveness and feasibility ... to build the official exploiting the assessment authorities, the provincial People's Committee for approval.

This trail was put into trial operation from 8/2016.

The introduction of eco-tourism route and exploit this discovery to the test in order to diversify the types of tourism, helping to meet the diverse needs of visitors to learn, discover the heritage values of the park Phong Nha Ke Bang.

It is reported that Hamad Valley (27 km cross Ho Chi Minh Road West Branch) is an area of natural landscapes, primeval forest vegetation with high biological diversity.

Hang Tra Ang (at Km17 the 20 Decision Win) than 650m deep, the water is collected from the cave caves Va, Son Doong cave, cave springs En Tra Ang spilled over 4km in length.

This is the underground cave system in the Green River, flowing inside the cool, stalactites system pristine, richly structured with impressive shape.