It was "rediscovered" in 1977 on the river by then geomorphology student Kevin Keirnan who went on to become the founding director of the Tasmanian Wilderness Society.It was originally dubbed Fraser Cave, after then-prime minister Malcolm Fraser, in a tactic to draw attention to the area.Nearly 200 passengers on one of the world's largest cruise ships are being treated for gastro as the liner docks in Hobart.Ovation of the Seas, which carries more than 5800 passengers, has been sailing for two weeks and arrived in Tasmania on Tuesday after a trip to Singapore.Tasmania was the home of Australia's first caverneering club which started in Hobart in 1946."In the 70s and onwards there was complete change," Dr Haygarth said."In modern times what happened in tourist caves was a much more scientific approach; the ecology of a cave - how things formed and the process of it."There has been hunger for wild cave tours."While the massive limestone karst system stretching across hundreds of kilometres of the Nullabor Plain is renowned for spanning two states, at 90 metres deep they are relatively shallow. The deepest vertical caves in Australia are in the Junee Florentine, where they drop to 380 metres.
Caves sought after for pure adventure are still being discovered, particularly near Maydena in the Florentine Valley which has been a forest conflict hotspot in recent years.
And Dr Haygarth believes "future conflicts are certain".