Holy Island, Anglesey Rhoscolyn, and Four Mile Bridge. Around of the Anglesey Coastal Path is on Holy Island. Peripheral islands and stacks include North Stack, and South Stack, with its famous lighthouse. Before – and even after – the construction of lighthouses, the cliffs and jagged rocks of the island were a great danger to sailors. Holy Island, Anglesey Holy Island (, 'the island of (Saint) Cybi') is an island () on the western side of the larger Isle of Anglesey, Wales, from which it is separated by a narrow, winding channel. It is called "Holy" because of the high concentration of standing
Salt Island, Anglesey a whole is strictly monitored and is virtually impossible for pedestrians to enter. Salt Island, Anglesey Salt Island () is joined to Holy Island, Anglesey, in North Wales. It is a natural provider of shelter for the town's Old Harbour from the Irish Sea and is part of the Port of Holyhead. The island gained its name by a factory located on it which processed sea water in order to extract sea salt. By the early 18th century, the sea salt was often mixed with rock salt (often smuggled onto the island) to increase the quality of the factory's product.