If your idea of a great vacation means being by the water, head to Drejo. Whatever you choose to do here, you're unlikely to get bored of those pretty views.
If you're going to Drejo in Syddanmark, make sure you leave time for some other sights too. After you've ticked off this water-surrounded land mass, Tåsinge Vejle isn't too far away will keep you entertained for a bit longer.