Ålands Sea
From Openwaterpedia
The Åland Sea (or Sea of Åland; Swedish: Ålands hav, Finnish: Ahvenanmeri) is a waterway in the southern Gulf of Bothnia, between Åland and Sweden. It connects the Bothnian Sea with the Baltic Sea proper. The western part of the basin is in Swedish territorial waters while the eastern part is in Finnish territorial waters.
Open Water Swimming
Jari Cennet Tammi completed a 33.3 km unsupported swim across the Åland Sea in August 2023.