2018/01/27

Bioluminescent plankton at Trwyn Du Lighthouse on Anglesey in Wales

© REX/Shutterstock

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.