A former volcano that has slowly disappeared under the water, Tikehau is now an atoll. Its surrounding coral reef, which marks the extent of the former volcano, has a 17 mile diameter. The emerging islets, formed by an accumulation of coral, are planted with coconut trees, agohos and Indian almond trees. Preserved and simply splendid, the atoll is reputed for its pink sand beaches and lagoon, which has one of the highest populations of fish in Polynesia. Visitors stay on Motu Tuherahera (where the airport is located) in one of the dozen guesthouses on the island. That is, unless they stay on Motu Aua (on the western end), where the Tikehau Pearl Beach Resort (the only hotel on the island) is located.