Veteran caving film maker Sid Perou has teamed up with photographer Ryan Deboodt to produce a compelling thirty nine minute film about the discovery of the world’s largest cave passage in Han Son Doong cave in Vietnam, the resulting development of tourism in the area and the beneficial effects not just for the local population but also for conservation.

Shot on location earlier this year the film follows the impact of the area of the Vietnam war, early discoveries by British and Vietnamese cavers and includes stunning footage of the cave.

Watching the film it’s hard to believe Sid’s contribution to the film, comprising over 50% of the footage, was shot using just a £400 handy-cam and a zero budget!