BBC made a film about Son Doong cave
BBC news agency has just written a request to the People's Committee of Quang Binh province, expressed its intention to get a film about the world's largest cave - Son Doong.Japan made 3D movies about Son Doong cave
The film crew of Japan's Kyodo went to Quang Binh yesterday to make a science film about Son Doong cave - the largest cave in the world.