Grótta Island Lighthouse, located in Seltjarnarnes, is a charming spot at the western tip of Reykjavík. Built in 1897 and still guiding ships today, this iconic white lighthouse offers stunning views of the ocean and wildlife. Bird watchers love it for spotting Arctic terns and eiders, while visitors enjoy the walking paths, northern lights in winter, and even a foot bath to relax in. With its mix of nature, history, and relaxation, Grótta Island Lighthouse is a must-visit gem for anyone exploring Reykjavík.