If your idea of a great vacation means being near the water, head to Shantou Treasure Island. Whatever you choose to do here, you're unlikely to get bored of those pretty views.
If you're going to Shantou Treasure Island in Shantou, make time for some other sights too. After you've finished at this water-surrounded land mass, Shantou Nan'ao Song Well isn't far away and will keep you on the move for a bit longer.