Yantra
The Yantra is a river in northern Bulgaria, a right tributary of the Danube. It is 285 km long, and has a watershed of 7,862 kmĀ². The Yantra has its source from the northern foot of Hadzhi Dimitar Peak in Central Stara Planina, at 1,340 m. In its upper course, it is alternatively known as Etar, its older name.