Taiaro is an atoll west of the Tuamotu group. It lies approx. 562 km (300 nautical miles or 349 miles) east-northeast of Tahiti. The shape of Taiaro Atoll is more or less circular, about 5 km in diameter, and 700 meters from the outer reef to the lagoon at its widest point. The land is almost completely covered by vegetation surrounding the lagoon which becomes in effect a deep salt water lake as it has no passage to the ocean. Its beaches consist of fine or coarse sand, interspersed with deposits of coral and shell detritus and occasional sediments of old conglomerate rock. The bottom of the lagoon is covered with extremely fine white sand. The outer reefs show a wide range between the sheltered western slopes where the coral fauna is rich. It is a private freehold property with a small house on the atoll.
The first recorded European arriving to the Taiaro Atoll was Captain Robert FitzRoy in 1835 along with Charles Darwin on board the ship Beagle, fresh from their epoc.making visit to the Galapagos. It was the last atoll of the Tuamotus to be recorded and charted. The first scientific work on Taiaro was done four years later in 1839, by the United States Exploring Expedition led by Charles Wilkes: "The lagoon appeared to be abounding with pearl oysters. On the island we found two small fresh water springs near the lagoon and a good supply of cocoa-nuts. Many plant specimens were obtained. In 1977 Taiaro was declared a protected area by UNESCO under the name Biosphere Reserve Taiaro Atoll. As the enclosed lagoon is completely isolated, it offers a particularly unique opportunity for studies of the ecosystem and evolution of coral reefs.