The Volga–Baltic Waterway (Volgobalt, Волгобалт), formerly known as the Mariinsk Canal System (Russian: Мариинская водная система), is a series of canals and rivers in Russia which link the Volga with the Baltic Sea via the Neva. Like the Volga–Don Canal, it connects the biggest lake on Earth, the Caspian Sea, to the World Ocean. Its overall length between Cherepovets and Lake Onega is 368 kilometres (229 mi). Originally constructed in the early 19th century, the system was rebuilt for larger vessels in the 1960s, becoming a part of the Unified Deep Water System of European Russia.