I-6 road (Bulgaria)
…In this section the road passes successively through three Sub-Balkan valleys between the Balkan Mountains to the north and Sredna Gora to the south — Saranska, Kamarska and Zlatitsa–Pirdop. In that section the road passes through the villages of Grigorevo, Sarantsi, Dolno Kamartsi and Chelopech, the towns of…