Koster Islands
Sweden
The Koster Islands (Swedish: Kosteröarna) situated 10 km west of Strömstad, Sweden, comprises an archipelago surrounding the two largest islands, South Koster and North Koster. South Koster has an area of 8 km2 and North Koster an area of 4 km2. The landscape, dominated by smooth bedrock, bears witness to volcanic activity and subsequent wear due to the Ice Age. The rocky coastline is broken by many sandy beaches, the largest being Kilesand on South Koster's east side overlooking the 200 meter deep Koster Fjord.
Data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).