The Sub-Balkan Valleys (Bulgarian: Подбалкански котловини, romanized: Podbalkanski kotlovini) are row of 11 valleys running from the Bulgarian border with Serbia east to the Black Sea. They are separating the Balkan Mountains from a chain of other mountains known as Srednogorie which includes Vitosha and Sredna Gora. There is great abundance of mineral waters. They are divided into two parts: Western (higher) and Eastern (lower). The western valleys include: Burel Valley; Sofia Valley; Saranska Valley; Kamarska Valley. The eastern valleys are: Zlatitsa–Pirdop Valley; Karlovo Valley; Kazanlak Valley; Tvarditsa Valley; Sliven Valley; Karnobat Valley; Aytos Valley.
References
- Георгиев, Милан, Физическа география на България, С., 1979 г., стр. 379 – 393.
- Мичев, Николай и др. Географски речник на България. София, Наука и изкуство, 1980. с. 378.
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