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Île Amsterdam is a sub-Antarctic island discovered by Juan Sebastián de Elcano on March 18, 1522. Having left the island unnamed, Dutch captain Anthonie van Diemen named it after his ship in 1633. The island is volcanic, but is currently inactive. It has an area of 55 km² and reaches as high as 867 meters at the Mont de la Dives. The island is one of few sub-Antarctic islands to have any sort of tree covering. The island is one of the French Southern Territories.