This is a reflecting pool. You are now about 15 metres underground in the Alexandra Cave at Naracoorte. The water depth is between 1 to 3 centimeters. In order to get the natural colours of the calcite flowstone to show properly, you need to be at least 10 feet away, a masked flash, and a good zoom. Very difficult shot, but if you know how to mask the flash then it should come out right. Don't worry about the pool drying out, the cave's humidity is 98%.photo by dave
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