Burgas Varna Province Mountains in Bulgaria Blagoevgrad Sofia region Pazardzhik Lovech Razgrad Pernik Veliko Tarnovo Gabrovo Kyustendilskaya Region Kardjali Vidin Stara Zagora Montana Province Haskovo Vraca Smolyan Targoviste Silistra Sofia-grad Dobrich Region Pleven Plovdiv Yambol Sliven Ruza Shoumen region