The Gambier, also known as Mangareva islands, is a small group of 26 islands in French Polynesia. The highest mountain on the Gambier islands is the Mount Duff on the Mangareva island. It is a volcanic remnant and 441 metres high.
French Polynesia 1964
The stamp is showing a view from Mangareva island with the cathedral of Rikitea and the Akamaru island in the background. The highest point of Akamaru has a height of 247 metres (name unknown).
French Polynesia 2012, Mangareva island.
The stamp was issued in the booklet "Paysages de Polynésie