Rusenski Lom
The Rusenski Lom ( ) is a river in northeastern Bulgaria, the last major right tributary of the Danube. It is formed by the rivers Beli Lom and Cherni Lom, the former taking its source south of Razgrad and the latter southeast of Popovo. The source of the Beli Lom at and above sea level is provisionally accepted as the point where the Rusenski Lom starts. Before they merge, the two rivers have a length of for the Cherni Lom and for the Beli Lom and a drainage basin of and respectively. Both rivers primarily run northwestwards, with the Beli  Lom going west at Senovo and the Cherni Lom flowing northeast after Shirokovo, as the two rivers get closer to merge east of Ivanovo. The Rusenski Lom empties into the Danube at the city of Ruse, which gives the river its name. The total length from the source of the Beli Lom is . The altitude of the mouth is above sea level. The Rusenski Lom flows through Rusenski Lom Nature Park.