Support WBURIlluminating The Underworld In A Deep, Dark French CaveCoburn DukehartSeptember 28, 2012 ShareCavers cross Lake Cadoux in a small dingy inside the Gouffre Berger cave. A 4-meter-deep (approximately 13 feet) pool of water blocks the way forward through the Starless River. (Courtesy of Robbie Shone)
