It allows sailing on the Szkarpawa and, at the same time, protects Żuławy from flooding. Formerly, next to the Watergate, there was a famous fortress that was the target of countless attacks, as whoever controlled this place governed commercial traffic from Poland to Gdańsk and Elbląg.
The fortress was constructed on the cape between the Wisła Gdańska and Szkarpawa and it played the strategic role of a post defending Gdańsk. The fortress had existed here in the 16th and 17th Centuries. By the end of the 17th Century (after the Peace of Oliwa) it was destroyed and its remains finally disappeared during the works on the Przekop Wisły. Today there is farmland on this site.