A South Australian sinkhole, known as the Shaft, was popular with extreme divers until four died underneath the ground due to ...
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Call to open site next to Mount Gambier's Umpherston Sinkhole as a tourist attraction"Coming into the Mount from the east, there's a major tourist attraction there — Umpherston Sinkhole — and the other one. "I don't think anywhere else in Australia has got quite the same ...
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