Kilbsys Sinkhole | Photo: Dr Richard HarrisTo view stunning images and video of the diversity of Australia's underwater caves, select from the links on the right.

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Video and image credits:

• Brigitte Bergmann
• Dr Richard (Harry) Harris
• Chris Holman
• Paul Lewis
• Oliver Mueller
• Geoff Paynter
• Liz Rogers
• Ken Smith
• Steve Trewavas
• Neil Vincent