Sestra River

The Sestra River flows through the Vsevolozhsky and Vyborgsky districts of Leningrad Oblast and the Kurortny district of Saint Petersburg, and its source is located in the swamps west of the village of Vaskelovo. In 1703, a battle took place on this river in which Peter I defeated the Swedish army of General Kroniort, and in the 17th century, a harbor and the trading settlement of Syysterbek already existed at its mouth. The length of the river, known in Finland as Rajajoki, is 85 kilometers, and the excess water from the Sestroretsk Razliv reservoir is discharged into the Gulf of Finland through a canal 4.8 kilometers long.