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The Daugava (Latgalian: Daugova; German: Düna) or Western Dvina (Russian: Западная Двина, romanized: Zapadnaya Dvina; Belarusian: Заходняя Дзвіна; Estonian: Väina; Finnish: Väinäjoki) is a large river rising in the Valdai Hills of Russia that flows through Belarus and Latvia into the Gulf of Riga of the Baltic Sea. The Daugava rises close to the source of the Volga. It is 1,020 km (630 mi) in length, of which 352 km (219 mi) are in Latvia and 325 km (202 mi) in Russia. It is a westward-flowing river, tracing out a great south-bending curve as it passes through northern Belarus.
Latvia's capital, Riga, bridges the river's estuary four times. Built on both riverbanks, the city centre is 15 kilometres (9.3 mi) from the river's mouth and is a significant port.