Gauja(Estonain andLivonianKoiva,GermanLivlandische Aa)- one of the longest rivers in Latvia: 452 km. Its source is in the hills south-east of Cēsis. It first flows east and north, and forms the border with Estonia for about 20 km. South of Valga and Valka, it turns west to the city Valmiera, and continues south-west near Cēsis and Sigulda. The Gauja flows into the Baltic Sea north-east of Riga. This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... For the Second World War frigate class, see River class frigate The Murray River in Australia A river is a large natural waterway. ... CÄ“sis (German: Wenden) is a town in Latvia located in the northern part of the Vidzeme Central upland. ... Valga is a town in South Estonia and the capital of Valga County. ... Valmiera (German: Wolmar) is the largest city of Vidzeme region, Latvia with a total area of 18. ... Sigulda, a town in the Vidzeme Region in Latvia, is situated in the most picturesque part of the primeval Gauja valley. ... The Baltic Sea is located in Northern Europe, bounded by the Scandinavian Peninsula, the mainlands of Northern Europe, Eastern Europe, Central Europe, and the Danish islands. ... Riga (RÄ«ga in Latvian), the capital of Latvia, is situated on the Baltic Sea coast on the mouth of River Daugava, at 56°58′ N 24°8′ E. Riga is the largest city in the Baltic States and serves as a major cultural, educational, political, financial, commercial and industrial...