Geograph - photograph every grid square

According to the visitor attraction's website Link

"Uncovered in 1987 during a scheme to landscape an area of the Great Orme, the copper mines discovered represent one of the most astounding archaeological discoveries of recent times. Dating back 4,000 years to the Bronze Age they change our views about the ancient people of Britain and their civilized and structured society 2,000 years before the Roman invasion.

Over the past 28 years mining engineers, cavers and archaeologists have been slowly uncovering more tunnels and large areas of the surface landscape to reveal what is now thought to be the largest prehistoric mine, so far discovered in the world."