Sea of Åland
The Sea of Åland is a waterway in the southern Gulf of Bothnia, between the Åland islands and Sweden. It connects the Bothnian Sea with the Baltic Sea proper. The seas are often choppy here. The narrowest part is named South Kvarken. The trench running on the bottom of the Sea of Åland contains the second-deepest spot of the Baltic Sea, at a depth of 301 meters, which is second only to Landsort Deep.
Many ferries moving between Finland and Sweden cross the Sea of Åland.
