Kamchiya
 The Kamchiya (also Kamchia and Kamčija Bulgarian: Камчия) is a 244.5 km long river in eastern Bulgaria the longest river on the Balkan Peninsula to flow directly into the Black Sea. It starts from the confluence of two rivers springing from Eastern Stara Planina Golyama Kamchiya (itself formed by the confluence of the rivers Ticha and Vrana) and Luda Kamchiya flows eastward to the Black Sea and empties into it 25 km south of Varna in the Resort of Kamchiya.