Windjana Gorge - ragged entrance of Windjana Gorge with nearly dried up Lennard river seen from the inside. The riff walls rise vertically up the sides of the river . Windjana Gorge National Park, Kimberley, Western Australia, Australia . The Geology of Windjana Gorge is quite interesting as it is actually a Devonian Reef. If one looks close; ancient life forms embedded in the gorge walls; can be discovered. Windjana Gorge is renowned for its hugh numbers of Freshwater Crocodiles which inhabit the river.