Admittedly one of the activities that we decided to pass on, many locals and tourists spend the day fossicking through the heaps of discarded mullock ( rubble ) left by the commercial opal mines looking for pieces of opal that may have been overlooked. This is called noodling.
Serious noodlers have a noodling machine which sifts and sorts the mullock in a darkroom, using ultraviolet light to highlight the pieces of opal.
Some things you just could not make up!
Below a typical Coober Pedy dug out dwelling and church:
The CP golf course has no greenery at all, so I suspect that their bunker shots are of an extremely high standard.
Aerial view of mullock piles: