The 400-metre zip-line over the Chay River to the entrance of Toi Cave in Quang Binh was recognised by the Vietnam Book of Records as the longest zip-line route in Vietnam on July 29 (Photo: VNA)
Chay River-Dark Cave zip-line system will be an attractive destination for tourists given its stunning terrain (Photo: VNA)
The modern zip-line system has been operational since September 2014, drawing about 30,000 travellers, most of whom are foreigners (Photo: VNA)