Luonnonmaa is an island in Southwest Finland. The island is in the Finnish Archipelago Sea (Finnish: Saaristomeri) region of the Baltic Sea, and located in the southernmost part of Finnish territorial waters. With an area of 44.0 square kilometers (17.0 sq mi), [1] Luonnonmaa is one the tens of thousands of islands, islets, and skerries that constitute the Finnish Archipelago.
Luonnonmaa is part of the municipality of Naantali, a summer resort town of around 20,000 people [2] and major tourism destination located within the Turku metropolitan area. [3] Naantali proper consists of a mainland portion in addition to approximately 1,000 islands, [3] of which Luonnonmaa is the largest. Luonnonmaa forms most of Naantali's area but has only a fraction of its permanent population.[ citation needed ]
Luonnonmaa is home to Kultaranta, the official summer residence of the President of Finland. [4]