The landscape, dominated by smooth bedrock, bears witness to volcanic activity and subsequent wear due to the Ice Age.
South Koster has a network of roads and paths, which can be explored by bicycle or in small golf buggies, both of which can be rented.
During the summer there are a variety of events and activities, such as a music festival, mackerel race, and trips to the seal colonies.
Several pubs and restaurants offer a varied menu, often based on seafood from local fishermen, such as shrimp, oyster, crayfish, crab, and lobster.
Connections to the mainland are good with sixteen ferry departures daily from Strömstad, a crossing of around 45 minutes.