The territory along the straits' path was transferred from Germany to Poland following World War II.

The regressive delta was formed by the floods of the Świna channel in the area of the Wolin National Park in 1996.

This water-muddy natural complex forms an archipelago of 44 islands and canals with changing directions of water flow.

The Delta Świna channel was formed by the Scandinavian glacier that withdrew from this territory 12,000 years ago.

During the western and northern storms, sea water flowed into Szczecin Lagoon, overflowing the islands.