Well this week's WIIW stumped everyone.
When I said look closely as a clue I was referring to the grey spots. They are shell fish.
As much as this looks at first glance to be tiles or cement paving; it isn't.
At Pirate's Bay in Tasmania is the "Tessellated Pavement"
It is a natural shelf of sedimentary rock that has been eroded into these elaborate patterns
In some parts it looks almost unremarkable
In others it looks like amazingly artificial blocks piled layer on layer.
All in all a remarkable location