We’ve done caves that have lighting. We’ve done caves that are pitch black. Now, at Tunnel Creek, we do something new: a cave, in total darkness, filled with water! Hands down, it is the best cave so far, bar none. Clutching torches and wearing togs, we splash our way down its 750 metre length. For grown ups, the water comes up to the knees and sometimes thighs… which means Benji is chest deep at times and, not surprisingly, opts to be carried on the return walk back. Jack and Rikki, meanwhile, are in their absolute element as they discover that this is one hike that they can doggy paddle their way through.