We walked through the tunnel to the other side of the Napier Range. The trek runs underground for 750 metres and you have to wade through several permanent pools and return the same way. At least five species of bats live in the cave, including ghost bats and fruit bats, and stalactites descend from the roof in many places. The roof has collapsed through to the top of the range near the centre of the tunnel. With a torch, reef shoes we were prepared to get wet… which happened! Freshwater crocodiles inhabit Tunnel Creek.