Oh, what a bay! Snug below sheer, wooded cliffs, this shimmering crescent of pale pebbles and translucent water is a soul-stirring sight. The catch (or not, depending on your point of view), is that it can only be reached on foot or by boat. Come in early morning or evening to see it at its peaceful best.
From Alcúdia, it's about 8km to an open spot in the woods where you can park. Follow the directions for the Fundació Yannick i Ben Jakober and keep on for another 2km. From this spot, you could climb the south trail to Sa Talaia. Then follow the signs to Coll Baix, a fairly easy half-hour descent. The main trail will lead you to the rocks south of the beach, from where you have to scramble back around to reach it.