Dziwna is an eastern strait, river or a branch of Oder River out of 3 straits connecting the Lagoon of Szczecin with the Bay of Pomerania of the Baltic Sea, between the island of Wolin and the Polish mainland. Simplified diagram A strait is a narrow channel of water that connects two larger bodies of water, and thus lies between two land masses. ... The Murray River in Australia. ... The Odra or Oder River (Czech/Polish: Odra, German: Oder, Ancient Latin: Viadua, Viadrus, Medieval Latin: Odera, Oddera) is a river in Central Europe. ... Lagoon of Szczecin or Bay of Szczecin (Polish: Zalew SzczeciÅski; German: Stettiner Haff, Oderhaff) is a inland water basin in Poland and Germany situated in the south-western part of the Baltic Sea in the mouth of Oder River north of the city of Szczecin. ... Bay of Pomerania or Pomeranian Bay (Polish: Zatoka Pomorska; German: Pommersche Bucht) is a basin in the south-western Baltic Sea, off the shores of Poland and Germany. ... The Baltic Sea is located in Northern Europe, bounded by the Scandinavian Peninsula, the mainlands of Northern Europe, Eastern Europe, Central Europe, and the Danish islands. ... Wolin is the name shared by an island located in the Baltic Sea located just off the Polish coast, and a town located on the island. ... In the mid-17th century a Swedish invasion rolled through the country in the turbulent time known as The Deluge (potop). ...