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Zashchitnaya Bay (, ) is the nothernmost part of the Vyborg Bay. It is located in the city of Vyborg (), Leningrad Oblast, Russia. The Vyborg Bay is part of the Gulf of Finland in the Baltic Sea. The Castle of Vyborg and the Monrepos Park face the Zashchitnaya Bay. The old Saimaa Canal (opened in 1856), as well as the new one, connect the Zashchitnaya Bay with the Lake Saimaa in Finland.