A 3-D scientific documentary on Son Doong, the world’s largest cave, in Phong Nha-Ke Bang National Park in the central province of Quang Binh, will be broadcast in 60 countries by the Japan Broadcasting Corporation, NHK, on June 26.
This was announced by the Quang Binh Department of Foreign Affairs on June 6.
The documentary film was made by the Kyodo News Agency since May 7.
Son Doong cave is more than 200 meters wide, 150 meters high, and at least 6.5 kilometers long.