thumbnail Bioluminescence at Trwyn Du Lighthouse in Wales
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Bioluminescence at Trwyn Du Lighthouse in Wales © REX/ShutterstockJoin Our GIFs Group
Bad weather and unpredictable tides can make the Irish Sea off the northwest coast of Wales a dicey passage. Many seafaring people had urged the leaders of Anglesey Island to build a lighthouse here, but it took a deadly shipwreck in 1831 to prompt the construction of Trwyn Du Lighthouse.