They will be equipped in appropriate attire as they explore the muddy area that has no artificial lighting .
There is also the two - hour long Signature Rock Discovery Tour where visitors will be taken to a section of the cave that is not open to the public .
visitors will be equipped in appropriate attire as visitors explore the muddy area that has no artificial lighting .
There is also the two - hour long Signature Rock Discovery Tour where visitors will be taken to a section of the cave that is not open to the public .