A caver whose years in the profession recently surpassed the three-decade mark, Hollis has delved far below ground in Thailand, Ireland, Wales and Spain. He ventured into the belly of France’s Gouffre Berger, once thought to be the world’s deepest cave, for three days in 1993. As Hollis made his gradual descent, a fierce waterfall coursed through the cave on his right; in the end he measured its height at 61 metres. The descent was steep: the slope of the cave ranged from 45 to 75 degrees, and loose rocks that threatened to fall from above posed a hazard. “The first thing that struck me was the volume and noise of the raging water,” Hollis said via email.

Source: National Post December 07, 2018 19:52 UTC