Take a glass-bottom boat to Es Vedra IslandEs Vedra Island, off the south-west coast of Ibiza, is steeped in legend. Some say it was the birthplace of a Phoenician goddess, others that it was home to Homer’s sirens. Whatever the truth, this uninhabited rock gets lots of visitors sailing around it. They usually stop off at Cala d’Hort beach afterwards for a paella lunch, as they gaze across the water to this mystical place. Boat trips leave from San Antonio’s harbour.