Sub-Balkan Valley

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.

A map of the Sub-Balkan valley in pink, with the Balkan Mountains to the north in blue and the Fore-Balkan in orange