This video shows a games developer - Dr Minh Tran - and her very first trip into the caves of Nullarbor.
Dr Minh Tran: So at one point… There will be nothing…. OK….
Where’s the ground?
So going down was pretty nerve wracking. I do feel as I’m in control of where I was going, so I was being swept around and bumping into the tunnel. The tunnel is not very big, it’s enough to fill a barrel of some kind. And I… made it out OK.