Exploring The Gouffre Berger(cave) in the Vercors region of France. At just over 1000m deep, The Gouffre Berger is recognised as one of the best sport trips in the world.

The crossing of Lake Cadoux in a small dingy. 4m deep pool of water blocks the way forward through the Starless River.

Related post: Some pretty jaw-dropping cave exploration photos from Robbie Shone