- Pengpeng Beach is actually an area of offshore sand bars created by deposition between Naioyu and Yuanbeiyu. The sand bars connect to become a long stretch of beach during ebb tide. However, seasonal winds change the actual location of the beach at different times of the year. It took nine years before enough sand was deposited to make Pengpeng Beach. The islet is composed of white corals, and the surrounding water is crystal clear. This is a good place for diving and other water sports.