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Walking south along the coast path of St David's Head in the Pembrokeshire National Park, amongst the bays and headlands of rugged and ragged cliffs and worn-down volcanic hills, one lesser, lower, headland stands out for its clearly man-made feature.
The squat little tower of Abereiddy, standing on a headland that is barely still there, more hole than headland, where the Blue Lagoon has been carved out as part of the long lost local slate mining industry.
Standing sentinel over the little bay and beach, and the little street of houses behind.
More photos in the Pembrokeshire gallery