The Tarkine hosts Tasmania’s greatest density of wild rivers. The major rivers remain remote and largely inaccessible. These include; Thornton, Lagoon, Pedder, Wild Wave, Interview (coastal), Donaldson, Little Donaldson, Keith, Lyons, Rapid, and Upper Savage (rainforests), Huskisson and Wilson (Southern Tarkine).
The Tarkine contains two of Tasmania’s Grandest Rivers, the Arthur River (which is the only complete river system in Tasmania that has no dam), and the Pieman River. The Arthur River is characterized by steep gorges and rapids, valleys blanketed in rainforest, and stretches of giant eucalypt forest.
It is fed by the Hellyer, Keith, Lyons, Rapid, and Frankland rivers. The Pieman River is most famous for its reflections. Like the Gordon, the Pieman, on a good day, gives spectacular mirror like river reflections. The section from Corinna to the coast is broad and flat and is flanked by rainforests, and Tasmania’s most northerly stands of Huon Pine. The Whyte, Savage and Donaldson rivers feed the Piemans lower stretches. The Upper Pieman river is dammed, and is fed by the Tarkine’s Huskisson, Wilson and Stanley rivers.
There are a number of spectacular known as well as barely known waterfalls within the Tarkine’s rainforests (including Philosopher’s Falls, McGowan’s Falls, lovers Falls).
The Tarkine contains globally significant magnesite cave systems. They are potentially the most significant if not the only significant system of magnesium cave systems in the world. They include caves, sub-surface cavities, sinkholes, springs, and surface features including gorges and castle-like formations. They are most significant in the upper Lyons River region. There are also a number of small cave features that show evidence of Aboriginal occupation within the Savage River Rainforests.