Leningrad Oblast of two great lakes of the European Part of Russia, Lake Ladoga and Lake Onega. Its northeastern part, between the Gulf of Finland and Lake Ladoga, occupies the Karelian Isthmus. Some islands in the Gulf of Finland (including Kotlin, on which the city of Kronstadt has been built) and Lake Ladoga (including Konevets) also belong to the oblast. Much of the area of the oblast belongs to the drainage basin of the Neva, which is the only outflow of Lake Ladoga. Whereas the Neva, which flows to the Gulf of Finland (the city of Saint Petersburg is located in its
Novaya Ladoga Volkhov and the Neva. It replaced the Old Ladoga Canal, built by Peter the Great, which thus became disused and decayed. The canals collectively are known as the Ladoga Canal. The district contains seven cultural heritage monuments of federal significance and additionally five objects classified as cultural and historical heritage of local significance. The federal monuments are the trading arcades, the Nikolo-Medvedsky Monastery, the monument erected to commemorate the opening of the Ladoga Canal, as well as two buildings related to the activities of Alexander Suvorov, who was a regiment commander in Novaya Ladoga, and the building hosted the headquarters