The Baar (German pronunciation: [ˈbaːɐ̯]) is a plateau that lies 600 to 900 metres above sea level in southwest Germany. It is bordered by the southeastern edge of the Black Forest to the west, the southwestern part of the Swabian Alb known as the Heuberg to the east, and the Randen mountain to the south. The Baar contains the source of the Neckar (a bog in Villingen-Schwenningen) and the Danube. The sources of the Danube, the Brigach and Breg, originate in Furtwangen im Schwarzwald and Sankt Georgen im Schwarzwald and join the smaller Donaubach in Donaueschingen.