A tour of Phong Nha Cave and a 6 km tour of Dark Cave took place on August 5th along with boat racing on the river at the Phong Nha Ke Bang Tourism centre.
The highlight of the activities is the new rock climbing facilities. A Cave Festival will also be held in Quang Binh on August 21st.
Tourism services on the Chay River have attracted large numbers of tourists, with activities including zipline, kayaking and other forms of adventure sports.
Since the beginning of 2015, the zipline at the Chay River has attracted more than 30,000 international tourists alone.
