<p>Caldey Island (Ynys Byr) lighthouse, Southern Pembrokeshire (Sir Benfro), south Wales. 
</p><p>Long since converted to automatic operation by Trinity House, the lighthouse stands to the south of the island, from which it warns shipping of hazards such as the nearby St. Margaret's Island and also the Woolhouse Rocks, to the east of Caldey.
</p>
On a clear day, you can see Lundy Island, 15 miles distant, from here.
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