Provincial people’s committee Vice Chairman Tran Tien Dung welcomed the delegation at Dong Hoi Airport. The ambassadors on the trip were from Argentina, Sweden, Italy, the UK, Australia and the Czech Republic. The cave tour was organised by the Ministry of Foreign Affairs in order to promote local tourism and explore the record-breaking cave.
Son Doong is located in Phong Nha-Ke Bang National Park in Son Trach Commune, Bo Trach District. Formed between 2 and 5 million years ago, the cave is more than 200m high, 150m wide and about 5 to 6.5 km long.