Milky Way, Rock Islands, Palau, by Jean-Bernard Carillet Lonely Planet

This turquoise cove is a popular swimming spot and, for those who love a good facial, an exhilarating experience. The water is actually an emulsion of white limestone sand. Dive down (about two to three metres), scrape some up and apply it to your skin – unforgettable! Most snorkelling excursions make a stop here.