In the blue-green bliss that is Sydney’s sea pool passeggiata, Fairy Bower is a tease, promising more than merely a swim within human-made concrete walls. The triangular pool is positioned at the side of a scenic walkway between the thronged Manly and Shelley beaches, but the fringing reef beside it is an intoxicating lure. Daily, just after dawn, swimmers leave stroke past the rockpool and through an aquatic reserve in which docile dusky sharks, giant cuttlefish, and turtles happily play.