South Stack Lighthouse, Holy Island, Wales  

South Stack Lighthouse, Holy Island, Wales

Built on the rugged cliffs of Holy Island, Wales, the South Stack Lighthouse stands watch over the deep waters of the Irish Sea. The 91-foot-tall white tower has guided sailors since its completion in 1809; it provides safe passage for ships on the Dublin-Holyhead-Liverpool route. When it was built, sperm whale oil was used to light the lamps; however, over the years, the mechanism has been upgraded to more advanced technology like LED bulbs and Fresnel lenses. Automated in 1984, the lighthouse continues to serve as a vital navigational aid, with its powerful beam shining up to 28 miles. As the sun sets and the sky fills with colors, the silhouette of the South Stack Lighthouse in the dusk makes for a stunning sight. Visitors brave the 400-step descent down the steep cliff face to explore the lighthouse, including its engine room and exhibition area.

© mariotlr/Getty Images

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