The film has premiered at a mountaineering film festival in the French city of Grenoble, and photos from the WOWO 2012 expedition will soon be available on the web.
To find out more about this underworld Isabelle Genoux talked to French speleologist and photographer Philip Bence.
The interview can be listened to on Radio Australia.
To find out more about this underworld Isabelle Genoux talked to French speleologist and photographer Philip Bence.
The interview can be listened to on Radio Australia.