Korpoo, Houtskär, Iniö, Nagu - Finnish Archipelago, Finland
Archipelago Sea is a part of the Baltic Sea between the Gulf of Bothnia, the Gulf of Finland and the Sea of Åland, within Finnish territorial waters. By some definitions it is the largest archipelago in the world by the number of islands, although the islands are very small and tightly clustered.
The larger islands are inhabited and connected by ferries and bridges. The Åland Islands, including the largest islands of the region, form an autonomous region within Finland. The rest of the islands are part of Finland Proper. The Archipelago Sea is a significant tourist destination.
Korpo is a former municipality of Finland. On 1 January 2009, it was consolidated with Houtskär, Iniö, Nagu and Pargas to form the new town of Väståboland.
References sources : wikipedia