The Visočica or Visochitsa (Cyrillic: Височица) is 71 km long, originating in Bulgaria from the mountain of Berkovska planina, a part of Stara Planina, near Kom Peak, just a few kilometers away from the Serbian border.
In 1963 a huge landslide jammed the river, creating a natural earth dam (500 m long and 50 m high) which in turn created a lake that flooded the village of Zavoj.