The tunnel creek cannot be walked through, rather must be waded through. The Tunnel Creek leads through a 750m long tunnel under the Napier Range. A flashlight is imperative. The creek bed is mostly sandy, but also rocky in a few places. Depending on the water level, you are over the knees in the water. Knowing that there are always a few crocodiles around, it is a little mental adventure, even if they are not really of the dangerous kind.