NZH It's after dark on a steamy night in the Blue Mountains when we gather under the Great Arch, the magnificent entrance to the famous Jenolan Caves, and we tell our guide that no, we don't believe in ghosts.
Well, not yet anyway.
The ghost talk crops up because a small number of us are about to begin the caves' Mysteries, Legends and Ghosts tour. It's said to be free of Hollywood-style gimmicks like sound effects, instead relying on true tales of ghostly sightings and unexplained goings-on to scare the hell out of cave-goers.
It seems the Jenolan Caves are so spectacular that some spirits never want to leave.
But first a bit about the caves themselves. Scientists recently discovered the network of limestone caves make up the world's oldest open cave system, dating back 340 million years.
The Aboriginal people named the caves, set in a secluded valley on the edge of the Blue Mountains World Heritage Reserve, Binoomea, or "Dark Places".
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