Llanddwyn Island is no Ibiza, but it definitely has its own charm — namely its somewhat secret beach coves. Being a tidal island, you can only get to Llanddwyn Island by foot during low tide (when it's not actually an island), but once you're there, you can easily explore it within an hour or so. Each cove is as cute as the next, but we like the small beach next to Tŵr Mawr lighthouse best.