Underground Explorers – School Journal Level 4 May 2015

Extreme cavers Marcus Thomas and Neil Silverwood lead a team deep into the belly of Mount Owen to prove a mind-boggling theory: that a hidden waterway connects the south and north sides of the mountain. By tracking a fluorescent-green dye through the freezing, labyrinthine passages of Bulmer Cavern, the explorers risk a grueling five-day underground journey to uncover a massive new network of passages and make caving history.