French Polynesia, an overseas collectivity of France, comprises more than 100 islands in the South Pacific, stretching for more than 2,000km. Divided into the Austral, Gambier, Marquesas, Society and Tuamotu archipelagos, they're known for their coral-fringed lagoons and over-the-water bungalow hotels. Island features include white- and black-sand beaches, mountains, rugged backcountry and towering waterfalls.