It is part of the municipality of Pyhtää in the Kymenlaakso region, Finland, and is 17 kilometres (11 mi) southwest of the city of Kotka.
[1] Kaunissaari forms part of an esker that juts out into the Gulf of Finland.
[4] Tourists and villagers in Kaunissaari are served by a retail store, restaurant and café opened in the 1980s and an archipelago museum, which presents the local history of the island.
[1][5] Kaunissaari holiday village offers accommodation in log cabins, and the old school building can also be rented for small groups.
[5] The current guest marina was built in the early 1990s because the old one became congested due to tourism.